I used to use a Paslode corrugated fastener gun to edge-join slabs of PB to create countertops shapes prior to laminating. Such gun, these days is a lot of money... like $500.00 I did find a XC1016 Spotnail gun, but up here, in Kanukistan, they still want over $500.00 if one includes shipping and a minimum of 11,000 fasteners (real number, btw) For the odd time I will still do a laminate top, I would still like to find a way to join two pieces of particle board substrate in a flat and strong fashion. Tonight, I used my Kreg jig and the end result of my test was rather promising. Now I'm thinking if I added a couple of biscuits and/or used a routed glue-joint (either wavy bit or glue-up joint) AND pocket screws...??
Any other ideas?