Originally Posted by
6376vette
I built the v2 gear diff for my sakura zero and it had noticeably less o ring drag compared to the v1 but is was still not as smooth as the spec r or xray diff. I only installed 2 of the large shims instead of three so a little o ring pressure was relieved. Maybe this helped a little.
The Spec R I got for my Photon was pretty tight in the o-rings as well.