You should be able to do that. Funny..many here in the US wish they could have a limited slip or locker like the EU has.
Its an easy install and i dont need turf mode as you call it (or polaris calls it that dunno).
All my machines so far had no rear diff, never had a problem.
Lsd rear diff kills 2wd off roading,especially low speed obstacle traversing, the machine hesitates on every obstacle while one rear wheel starts spining till the lsd engages then the machine goes.
Very annoying, the first time i thought something was broken lol.
edit: Not to mention that my part costs 6 times as much, if i end up doing the surgery ill put it up for sale.