This is the main reason, IMHO, to favour Titebond over HHG for doing a complicated and lengthy glue job like a top. I did one with Titebond today and it gives you enough time to do the whole thing in one go with no stress.
You could try this method used by some violin makers:
Brush the HHG on the side/linings and also on the underside of the top where it will make contact. You don't need to hurry the next stage as you can allow the glue to cool. The neat thing with HHG is that when newly applied, it can be re-heated for re-positioning and will still have a good grab.
Place the top in position. Have ready some heated knives in near-boiling water. Use them to re-melt the glue working a small portion at a time and clamping down with spool clamps immediately. Works a treat and you can take your time, provided you have previously opened up your spool clamps to near enough the right width!
I thought I'd share an idea I plan to try out soon. To have the spool clamps open to the right size and ready to clamp, cut lengths of rubber tubing to the size of the opening wanted and put them on the bolts running through the spools. The tubing will hold the clamp open until you're ready, and once the clamp is in place, it will keep the threads of the bolt away from the wood surface.
If you have a go bar deck and a caul shaped like the guitar or a piece of plywood you can glue it up all in one shot
build a go bar deck you will like it better i think, i started out with spool clamps and only used them for my first guitar,only use them for an occasional repair now.
cheers Mark, ( warning guitar building is more addicting than heroin!)