I have a neighbor who just welded my stainless hobie wheels.  Turns out that Hobie only spot welds the joints and it  leaves them prone to breakage which is what happened to mine.  He  went over all joints for me.  Cost was 45.00.

If you'd  like,  I can show  him your pictures and  if he says yes, I pass his info to you .  He is a retired welder.