Well got a few more pics today couldn't leave well enough alone.
Set up a couple of pieces to see how they would look and then just decided to glue them together. I had to do this on my kitchen table because it is completely flat unlike the garage floor.
* Weld-on #4
* speed squares
I took the side piece and layed it onto the bottom piece to try to get one of my sump sides. Once I was satisfied with how it fit I took the applicator and ran some of the solvent along the joint edge and held the two pieces together with the speed square as a referance. The weld-on is kind of like pvc
cement. It works the same way except with plex. After about 30 or so seconds the pieces have enough of a hold that you can let go and then put on the clamps. At this time I would check my joints and if there were any air bubbles I would run another bead of the solvent on the other side of the joint. You can very easily see air in a plex joint and see if it needs more solvent or not. Once I had the back part of my sump glued to the bottom piece I wanted to put one of the sides on and did so. Pretty much the same thing. You have to love the speed square for quick setup. Here some pics.