I've got the D30 with chromoly shafts, 4.88s, Detroit Locker and a 3/8" steel diff cover, I haven't had problems yet running 33's *knock on wood* I want to run 35's but I'm not going any bigger than that,
i think i broke a clip on my shifter bezel, but its the same bezel out of the full console. i think i can probably find out what that will cost to ship tomorrow.
I like KM2's myself, our Suburban has the Wrangler MT/R's and my dads XJ had super swampers, i like the km2s the most and will be purchasing another set.