Gear-Diff for low-to-mid traction dirt

[DangerCow]

I know I know...I should be running the ball diff (which I have), but I'd like to give the gear-diff a shot as our club moves from indoor carpet to outdoor dirt. I understand that most on this forum are in the UK where tracks are different than our North American counter-parts (I'm in Western Canada), but I'm wondering if there are any with experience with the set-up for dirt/gear-diff?

I ran 1000cst in my diff for the whole of the 7 month indoor season (high-grip carpet), and I expect to initially try 2000cst outdoors but would love to hear ideas!

I will be doing the rear-shock mod, and may try RM4 as traction can be low at the start of the season (later on the track get "sealed" with some, I don't know, glue or something).

Thanks for your time thinking of this!