Yeah i should have just made a dang jig and used pins. I thought capillary would be alright since its just a frag tank. Kind of happy i messed up the seams, as i likely would have ran it and had a failure. Just need to get a good fence setup and rip a half inch off, router it, and retry. The modular marine overflow is so nice.
I may even run it as a frag tank underneath the other frag tank inside the cabinet....