the weak spots on thease sleds are the running bords. Not the whole tunnel. Hell i haven't even cracked my cf bumper yet? Idk who all on this forum has rode with me, but you won't find many people that flat out abue their sleds like i do. I put 1200 miles on my assault in about 2-3 months. I dislocated my sholder and had a few other injeries so i stopped riding way before spring snow hit. /all my miles are hard boondocking the the trees, flipping the sled over, rolling it, jumping it, ETC. IMO, this chassis holds up way better than the IQ, and IQ raw. I don't know if you guys remember or even rode the 05 and 06 Iq's but i would jump them so hard the side panels would blow off... your telling me the chassis wasn't flexing?
Our pro's are refined IQR's with longer tracks. They are realy good, just polaris built the running bords to soft. I also broke my chaincase from jumping but i think that had to do with a bad cast from polaris... granted, i also blew my lower sproket apart.
For me, i persinaly wouldn't want those tunnel sides to be honest. BUT, i don't pack 40 gallons of fuel in the back country... just my fat *** and a tow strap for the doo's.