Good luck with the whole mess rickshaw.

I find it hard to believe that it was the owner who butchered this job tho. The policy at every shop that I know of has a strict policy that customers are not allowed in the bay (even worse to ask for help) for liability reasons. Asking a customer to hold pipe that is being welded is asking for someone to get hurt.

I had an incident a couple of years ago with the SeaDoo. The shop was replacing the impeller and venturi. The didn't install a seal properly and a bearing burned up during the first use. The lead mech told me that it was properly installed (despite the repair receipt from the guy who actually fixed it) and that my ski was just old (10 years) and that I shouldn't bring it back any more for them to work on. The owner was NOT pleased & reimbursed me for the initial repairs.

When you go back, clearly indicate that it is NOT merely cosmetic. Bends, welds and angles on an exhaust are common failure points. You should be anticipating premature failure due to the shoddy workmanship.