OK! My type of fabrication!!!
Go to your local hobby shop. Ask for CA glue, its just superglue. Thay might call it airplane glue. there is also a stuff called "zap a gap" which I have used, its a gap filling superglue, works the same for me. They have divverent viscosites and dry times.
AND THE BEST PART. The "insta-set spray" its an accelerator that causes the glue to set up inlike 2 seconds.
As far as the fleece on the frame. buy an extra bottle of the glue and GLUE it on the frame. The staples will almost always break some of the glue, so just glue it on instead.
something like this
Kevin- liquid nails wouldnt work since youd have to hold it in place for a long time... my ported box now has ai think 10 screws in it... I aligned the pieces, superglued them together..then gorilla glued the seams.