If things really get bad, you loosen every spoke evenly in order to keep the rim from getting to far out, then start over. As long as you don't taco the rim, it will be ok.
The 40 mile failure the shopdude built for me, I disassembled it evenly and rebuilt it. Now 16,000 mile no issues. If you talk to the shop guys, they will say, "Oh dude, don't reuse it, it'll explode". Yeah, buy another one spend more money!