Advice from the wise, please. In process of redoing all of the trim in the final room of the whole house renovation. Window casing is removed and there's a puny bit of fiberglass shoved into a few gaps, but most of the space between framing and jamb is open. Typical gap is 1/2" wide. Wall is 2x6 construction. I'm aiming for good air seal. I'm somewhat nervous to use the Great Stuff window and door after a couple of experiences where this stuff bulged out window jambs (even when it says it won't). Room is otherwise refinished, walls renewed/painted, and floor in good shape, and some of the windows are clerestory and 12 feet off the ground--something that is minimal mess potential is also desirable (the great stuff cans, whatever precautions I take, tend to involve spray foam getting everywhere). Thanks for any advice about best systems/products out there.