So some preferences for 3
♥ by West and 3
♦ by East over double are emerging, no surprise.
Let's give it another morning when all are back at their desks
I confess I was also curious if people play some exotic gadget that would enable them to show 5-5 in West, or a game force ask by East. I have one partner who in West would probably pretend that 3NT must be 5-5, as wishing to play with a clubs stop he could have doubled then rebid 3NT. I can also imagine someone cue bidding 4
♣ in East over double, hoping to hear 4
♥. Both bids could be conventionalised more precisely by an ambitious partnership, and I wouldn't be surprised if there are others.