I only just saw these - ltwoo make mtb rear mechs with a clutch for 7 speeds and up! Posting here as clutch tech is "modern", but might be better in pre-98 as it relates to 7 and 8 speed? Anyone tried them? I think I will order an 8 speed version for my Yates - seems to be standard Shimano cable pull so should work fine with the deore DX drivetrain, friction shifters, etc!