Shit man, wish I had something constructive and helpful to add. (Moral support, sure - but that's a given). Carbs on my 750 gave me shit for 6 months - my problems were multiple. Are you back to your OEM carb? Your float height is good? Decent seat and float needle? They caused me the most issues. Also the seat on the emulsion tube that the needle on the vacuum slide enters - one of those had worn a little and caused a rich (I think it was rich, damn, I had to deal with so much shit I can't remember) situation. Air leaks also, but you've ruled them out. Spark plug gap? Your oil doesn't smell of gas does it?
Sending good vibes Mike, you'll get this. But always keep torching the fucker in your back pocket.