^ Forgot: I'd rather risk being 'one of those customers everyone complains about' than being unhappy with results because of miscommunication. Tbh, I don't think the alteration guys mind. If anything, they always seem happy that I like their work and keep coming back to them.
My default is two buttons with 1'' between the buttonholes.First suit I had done with 2 button sleeves was spaced a little wider, with exactly the width of a button between the 2 buttons. It does look a bit odd, but I've also seen this wider placement on a bunch of old pics, so that's also 'historically correct'.