In playing a game this evening, my opponent said that he had been told by several people at a Store Championships, that a Y-wing with BTL-A4 can only use R3-A2 on one of its attacks.
Since my list for my final Store Championships depends on exactly this double effect, I wanted to check that this was not the case. I have used my considerable search-fu and have come up with no chatter anywhere on the Internet to the effect that R3 can't trigger twice in one turn. Every time I've seen R3A2 and BTL mentioned in conjunction, the possibility of double stress in a single turn is brought up, with no dissent. This assumption has become commonplace.
Has anybody heard anything about this being not the case? I'm crossing my t's and dotting my i's here, but just checking.