New Rzr owner looking for some tips.

I just picked up an 08 Rzr with a 2" lift and wheel spacers. I’ve been reading up on this bike for weeks and want to make sure I have everything I need to look at covered. Here’s what I’ve got so far.
1. Add thread locker or weld pinion nut on rear end.
2. Solid motor mounts ( my motor is very sloppy).
3. Already checked air intake system but want to replace with something better.
4. Remove spacer on primary clutch.
5. Rzr S header and mid pipe, mine was cracked all over. Welded it up but don’t think it will last.
6. New tires, think bighorns will work for me mostly hunting and trail riding very little mud.

That’s a start. Does the 08 have the plastic carrier in the front dif? What am I missing? I want this thing to last a while, it has 1900 miles on it and it’s in pretty good shape. It runs good now but I didn’t get much history on the bike as the guy got it in on a trade. Anything else you veterans can think of that may need attention? Thanks, Carl.