Cuda..
Stock diff is fine.. build per instructions.. Diff is adjustable extranally when installed in greabox/chassis, just need to remove c-hub/hub pin to get a straight shot at it.. can be adjusted in 5 min once you get it down..
Slotted diff screw is stronger cause it has a long shoulder... (not threaded the entire length) but will require loctite to secure to supplied t-nut.. doesnt come with locknut