Rovan Diff not working with FLM cups

[chip39]

i am assuming that KM or HPI are the only ones that will work.

 

[Z.hb71]

Flm cups will only work in the original hpi diff. Rovan and km diffs have different tolerances and won't work . Your kinda stuck with the Rovan cups

 

[kreb]

When my hpi diff went i replaced it with (sorry can't remember wich one rovan or km it's been a few years now) and i have flm extended arms, cups, drives and they fit perfectly. Maybe there's something different nowadays but my worked perfectly.