i bought the little jar of spring clamps at harbor freight they are useful for glue ups like that and i have a big bag of wooden clothes pin too.

have you tried the plastic cloths pins? they done stick...as bad.

that first picture had me worried that all 900 of those pins were glued in place...

We should have a society.
"The Brotherhood of the Peg"
With a secret handshake.
And a hat.
We must have a hat.

Duco cement and the wood glues are the easiest glues to sand. The finish resin epoxies are next. 'Regular' epoxies seem a little rubbery and load sandpaper quicker. Polyester resins are very hard (but I don't use them to assemble airframe parts) and are better if mixed with microballoons. CA's are just plain 'hard' and in no way do I want them on a surface that needs to be finished sanded. I have no experience with the new foaming adhesives and such. Elmer's or Titebond wood glue is so inexpensive. I buy it by the 1/2 gallon and use a small glue bottle that I refill as needed. It is one of those little Elmer's school sized bottles that has a nice fine tip. Makes accurate placement of glue a breeze and it doesn't clog.