For glue up, I put glue on both surfaces, using a silicon brush. There was probably more glue than necessary, but this was my first veneer job, so I didn't really know any better. I am planning on just doing lacquer over it, though I had played with the idea of doing shellac first just to give it some warmth, as my lacquer is waterbased. Maybe I will go that route with CA. I have some thin CA with stewmac's whip tips. I'll play aroung with it. I have enough veneer to redo the top if need be, but I would like to avoid that hassle.
For the gap, I actually just sat down to think about the geometry better and got that worked out, so the only issue now is my one or two bubbles.