No...let's not start a thread like that.
....I would have to admit then that I poured boiling water into a 3/4" pvc pipe to take the stiffness out of an arch and ended up with something between a rectangle and an arch shaped pipe. it was cut into sections and made it's way into the recycling bin.
I started this hobby way back when I was 40....it's my second year doing this. If I get to 73 and don't fall off the roof, don't fall off a ladder, don't fling solder into my eye, don't cut my hand with a saw, don't skin my arm when a drill bit slips, than a few do-overs on the arches will be something I'll be ok with....but right now things like that just drive me nuts!!!