I went to a weld shop to get the stinger rewelded on a 50cc gasser canister, and he charged me $35. Was done in two hours.

As far as penetration of the base material, as mentioned, alumiweld is basically a solder - there is no penetration. But what I was referreing to was that the Alumiweld just melted off and the repair failed when the exhaust system got up to temperature. Alumiweld actually melts around 750 F I believe. Alumiweld is great for low temp applications (boats, brackets, piping, valve covers, etc) but not so good for high temp applications like exhaust systems.

Brad