Adding threads to your 3D prints is a life-changing feature, but obviously there are a lot of trade-offs and considerations when deciding on how to go about this exactly. Between self-tapping screws, ...
Are you sure PLA foam dissolves in acetone? You might want to do a test to confirm before committing to a big print. As Drizzt321 says, ABS can be nicely smoothed with and acetone but it would be a ...