It's ok... you saved me a LOT of thinking as well. Cracked/repaired Spinergy? Can I ride 'em? Should I put my money on 'em anyway dispite the risks? What if this, what if that. Yes, I think that you've choosed the best solution for all sides.
Can we see some pics of that repair anyway? I'mean.. is it welded? how did you heat treated after the welding is done? I just can't see HOW it's done with all that carbon... but maybe I'm wrong? send some pics..