I had two used exhaust stubs but decided to use the stubs that came with the muffler set. The supplied pipes are too long for my use. I cut the pipes off, chucked the stubs up in the lathe and counter bored to accept the 25 mm K-S tubes. I did manage to get different flux at the welding supply store. We'll know how it works out. The dry fitting process has begun.

Tasesq,
I hope you have fun, thanks for the offer but I think I'm in good shape. Do you plan to fly or do a little work?