The 3 spoke wheels are really soft, I suppose it`s better than them breaking!!!!
I had a 3 spoke rear, I put some soap on the rim and lots of heat on the other side, when the soap went black the wheel had annealed (possibly not an exact science) I then using my 6ft7in bro in law, a sledge hammer and some wood adjusted the wheel to almost within spec (by eye) I then used the wheel for lots of miles
Ray