Never, and it shouldn't.

I took Dave's response that I quoted to mean that he was for the weight increase so that he wouldn't have to spend the money to get his airplanes to a legal weight. This perplexed me as Dave has flown FAI as long as I've known him.

Also, to play devil's advocate, and my apologies if I've glossed this one over, but what if someone builds an airplane to conform to the new AMA rules, assuming that a weight increase is permitted to include Masters. This pilot decides to move to FAI, where they presumably will retain the 5kg weight limit. This pilot would be screwed, wouldn't he?