Typically you would saw cut or route the acrylic pieces. Yes weld on is a solvent and it's more like welding vs glue. Again this was an idea to create a simple sump tank that some members could use. Simply apply weld on #16 to the joints then assemble the box. If you actually have some long clamps it would obviously work much better. Yes I have glued one of these and with a little common sense the average person can do this. Once the tank is dry you can then run a bead of silicon or weld on 16 to act as a sealant. Remember this is a simple 20g sump. This is the biggest I would go with this design. It's not that easy to square and solvent weld up routed panels without alot of jigs. The whole point was to sell these at my cost of material and help a few members out. Not trying to get rich off this. Shipping is totally out of the question. If everyone want's some acrylic panels routed or without the tabs PM ME and we can talk.