By default, new muscles should have a bevel modifier as the last modifier, and "regular muscle" node as the penultimate modifier. Regular muscle should have a node group with curve to mesh and curve circle nodes, so that this can be shared across all muscles. Set material will work just like in the volumetric geo node group.
Add bevel modifier as the last modifier
Add "regular muscle" modifier as the penultimate modifier
ensure that adding new points, the hook modifier is not at the end of the list
ensure that when inserting points, the hook modifier is not at the end of the list
By default, new muscles should have a bevel modifier as the last modifier, and "regular muscle" node as the penultimate modifier. Regular muscle should have a node group with curve to mesh and curve circle nodes, so that this can be shared across all muscles. Set material will work just like in the volumetric geo node group.