diff --git a/scripts/conversion/convert_informative_drawings.py b/scripts/conversion/convert_informative_drawings.py
index d163472..df350b6 100644
--- a/scripts/conversion/convert_informative_drawings.py
+++ b/scripts/conversion/convert_informative_drawings.py
@@ -1,5 +1,5 @@
 import argparse
-from typing import TYPE_CHECKING, cast
+from typing import cast
 
 import torch
 from torch import nn
@@ -15,8 +15,6 @@ except ImportError:
         "Please download the model.py file from https://github.com/carolineec/informative-drawings and add it to your"
         " PYTHONPATH"
     )
-if TYPE_CHECKING:
-    Generator = cast(nn.Module, Generator)
 
 
 class Args(argparse.Namespace):
@@ -27,7 +25,7 @@ class Args(argparse.Namespace):
 
 
 def setup_converter(args: Args) -> ModelConverter:
-    source = Generator(3, 1, 3)
+    source = cast(nn.Module, Generator(3, 1, 3))
     source.load_state_dict(state_dict=load_tensors(args.source_path))
     source.eval()
     target = InformativeDrawings()
diff --git a/src/refiners/foundationals/latent_diffusion/solvers/ddim.py b/src/refiners/foundationals/latent_diffusion/solvers/ddim.py
index d4d5a81..6b21980 100644
--- a/src/refiners/foundationals/latent_diffusion/solvers/ddim.py
+++ b/src/refiners/foundationals/latent_diffusion/solvers/ddim.py
@@ -3,9 +3,9 @@ import dataclasses
 from torch import Generator, Tensor, device as Device, dtype as Dtype, float32, sqrt, tensor
 
 from refiners.foundationals.latent_diffusion.solvers.solver import (
+    BaseSolverParams,
     ModelPredictionType,
     Solver,
-    SolverParams,
     TimestepSpacing,
 )
 
@@ -26,7 +26,7 @@ class DDIM(Solver):
         self,
         num_inference_steps: int,
         first_inference_step: int = 0,
-        params: SolverParams | None = None,
+        params: BaseSolverParams | None = None,
         device: Device | str = "cpu",
         dtype: Dtype = float32,
     ) -> None:
diff --git a/src/refiners/foundationals/latent_diffusion/solvers/ddpm.py b/src/refiners/foundationals/latent_diffusion/solvers/ddpm.py
index 442a63a..efa50fa 100644
--- a/src/refiners/foundationals/latent_diffusion/solvers/ddpm.py
+++ b/src/refiners/foundationals/latent_diffusion/solvers/ddpm.py
@@ -3,9 +3,9 @@ import dataclasses
 from torch import Generator, Tensor, device as Device
 
 from refiners.foundationals.latent_diffusion.solvers.solver import (
+    BaseSolverParams,
     ModelPredictionType,
     Solver,
-    SolverParams,
     TimestepSpacing,
 )
 
@@ -29,7 +29,7 @@ class DDPM(Solver):
         self,
         num_inference_steps: int,
         first_inference_step: int = 0,
-        params: SolverParams | None = None,
+        params: BaseSolverParams | None = None,
         device: Device | str = "cpu",
     ) -> None:
         """Initializes a new DDPM solver.
diff --git a/src/refiners/foundationals/latent_diffusion/solvers/dpm.py b/src/refiners/foundationals/latent_diffusion/solvers/dpm.py
index 15a953e..2074715 100644
--- a/src/refiners/foundationals/latent_diffusion/solvers/dpm.py
+++ b/src/refiners/foundationals/latent_diffusion/solvers/dpm.py
@@ -5,9 +5,9 @@ import numpy as np
 from torch import Generator, Tensor, device as Device, dtype as Dtype, exp, float32, tensor
 
 from refiners.foundationals.latent_diffusion.solvers.solver import (
+    BaseSolverParams,
     ModelPredictionType,
     Solver,
-    SolverParams,
     TimestepSpacing,
 )
 
@@ -34,7 +34,7 @@ class DPMSolver(Solver):
         self,
         num_inference_steps: int,
         first_inference_step: int = 0,
-        params: SolverParams | None = None,
+        params: BaseSolverParams | None = None,
         last_step_first_order: bool = False,
         device: Device | str = "cpu",
         dtype: Dtype = float32,
diff --git a/src/refiners/foundationals/latent_diffusion/solvers/euler.py b/src/refiners/foundationals/latent_diffusion/solvers/euler.py
index e88c48c..09f8007 100644
--- a/src/refiners/foundationals/latent_diffusion/solvers/euler.py
+++ b/src/refiners/foundationals/latent_diffusion/solvers/euler.py
@@ -3,10 +3,10 @@ import torch
 from torch import Generator, Tensor, device as Device, dtype as Dtype, float32, tensor
 
 from refiners.foundationals.latent_diffusion.solvers.solver import (
+    BaseSolverParams,
     ModelPredictionType,
     NoiseSchedule,
     Solver,
-    SolverParams,
 )
 
 
@@ -21,7 +21,7 @@ class Euler(Solver):
         self,
         num_inference_steps: int,
         first_inference_step: int = 0,
-        params: SolverParams | None = None,
+        params: BaseSolverParams | None = None,
         device: Device | str = "cpu",
         dtype: Dtype = float32,
     ):
diff --git a/src/refiners/foundationals/latent_diffusion/solvers/lcm.py b/src/refiners/foundationals/latent_diffusion/solvers/lcm.py
index c7087d2..06a45c8 100644
--- a/src/refiners/foundationals/latent_diffusion/solvers/lcm.py
+++ b/src/refiners/foundationals/latent_diffusion/solvers/lcm.py
@@ -4,6 +4,7 @@ import torch
 
 from refiners.foundationals.latent_diffusion.solvers.dpm import DPMSolver
 from refiners.foundationals.latent_diffusion.solvers.solver import (
+    BaseSolverParams,
     ModelPredictionType,
     Solver,
     SolverParams,
@@ -29,7 +30,7 @@ class LCMSolver(Solver):
         self,
         num_inference_steps: int,
         first_inference_step: int = 0,
-        params: SolverParams | None = None,
+        params: BaseSolverParams | None = None,
         num_orig_steps: int = 50,
         device: torch.device | str = "cpu",
         dtype: torch.dtype = torch.float32,
diff --git a/src/refiners/foundationals/latent_diffusion/solvers/solver.py b/src/refiners/foundationals/latent_diffusion/solvers/solver.py
index 24c570b..1572091 100644
--- a/src/refiners/foundationals/latent_diffusion/solvers/solver.py
+++ b/src/refiners/foundationals/latent_diffusion/solvers/solver.py
@@ -71,7 +71,18 @@ class ModelPredictionType(str, Enum):
 
 
 @dataclasses.dataclass(kw_only=True, frozen=True)
-class SolverParams:
+class BaseSolverParams:
+    num_train_timesteps: int | None
+    timesteps_spacing: TimestepSpacing | None
+    timesteps_offset: int | None
+    initial_diffusion_rate: float | None
+    final_diffusion_rate: float | None
+    noise_schedule: NoiseSchedule | None
+    model_prediction_type: ModelPredictionType | None
+
+
+@dataclasses.dataclass(kw_only=True, frozen=True)
+class SolverParams(BaseSolverParams):
     """Common parameters for solvers.
 
     Args:
@@ -94,7 +105,7 @@ class SolverParams:
 
 
 @dataclasses.dataclass(kw_only=True, frozen=True)
-class ResolvedSolverParams(SolverParams):
+class ResolvedSolverParams(BaseSolverParams):
     num_train_timesteps: int
     timesteps_spacing: TimestepSpacing
     timesteps_offset: int
@@ -131,7 +142,7 @@ class Solver(fl.Module, ABC):
         self,
         num_inference_steps: int,
         first_inference_step: int = 0,
-        params: SolverParams | None = None,
+        params: BaseSolverParams | None = None,
         device: Device | str = "cpu",
         dtype: DType = float32,
     ) -> None:
@@ -158,7 +169,7 @@ class Solver(fl.Module, ABC):
 
         self.to(device=device, dtype=dtype)
 
-    def resolve_params(self, params: SolverParams | None) -> ResolvedSolverParams:
+    def resolve_params(self, params: BaseSolverParams | None) -> ResolvedSolverParams:
         if params is None:
             return dataclasses.replace(self.default_params)
         return dataclasses.replace(