My plan was to build pullouts entirely out of 1/2 inch Baltic birch ply with some some type of drawer lock joinery, glued and brad nailed. Think I’ll do the mock up as mentioned above and weigh them. One more question, I’ve been using euro door hinges and the 32mm system. I’ve asked once before about having to drill the mounting plates to accommodate the 5mm screws I’m using. Only answer I received was I’m buying from the wrong supplier. That project I drilled all the plates, worked out fine. Can I specifically order hinge plate for 5mm screws? Thanks for the help.