This is what happened to my tunnel extension, i was worried that it would be to weak to lift the sled in the back but that was no problem it was to weak whe you pushed it down.
i just used standard aluminum since nothing else was available in Town and i needed something for my testride with the long track.
For the new tunnel i will order some better grade aluminum.
Any suggestions on what type of aluminum ? the only bend will be the lip for the runningboards.
Had the same misshap on my pro; jump gone wrong and I let the sled land by itself. Would have been fine if I had not landed on the rear of the tunnel..
Decided not to spread my legs and land with my crotch, lol, so my feet bent it down.
My fix was heating and bending back + some hours of work with hammers along with PAR tunnel sides.
But for your sled, you need something to beef up the lower edge of the tunnel. See how all sleds have a rolled up lip or something to strengthen that edge? New proclimbs take a different path with a long rear bumper going down along the edge and connecting with the end of the boards.
You should do something along those lines. Either reinforce with more and/or thicker alu or run a proclimb bumper.
RS