HRA has released an SCC Interpolation Control tool for the
One Chip MSX that allowes you to alter the SCC interpolation settings when using
HRA's set of One Chip MSX updates which has been named
One Chip MSX-KAI. He further mentions that in order to improve the VDP model of the One Chip MSX, the recently added turboR counter might have to be removed in the future.
Relevant link:
HRA's One Chip MSX notes 
