Hi guys,
Just wondering if anyone out here has tried to fit a gear diff from another car in the TRF201?

The ball diff I have works nicely, but I'd love to try out a gear diff in it.
I know there is a gear diff for the FF03 by Spec-R, but I heard it's too wide to fit in the TRF201 gear casing. I looked a little further and since the AEB4/4.1, TRF201 and with some parts even the DEX210 share the geometry of parts, I was wondering whether the gear diffs of these might fit. I quickly figured the DEX210 diff wouldn't work due to the very short outdrives. The B4 has imperial sizes but perhaps someone has tried it?
So in short: Anyone got more information on this?