+1
Clear packaging tape all the way across the top and bottom of the two packs together, then wrap the front and rear of the stick with a couple turns of packing tape. A small section of heat shrink in the middle to stiffen the packs and I've never been happier. They've held up very well, and changing packs is a breeze. I just use about an inch or a little more of 3M Dual Lock at the front and strap them down. They're easy in, easy out and never move.