Thanks for the reply James.
Yes, still Chemcast. The router bit was new when I started this acrylic work. I have done a small tank (15 Gallons), a sump (20x20x16) and this tank (21x21x21) with it, that's it. It has not been resharpened.
Could I be using too much WO4? I have been worried it is drying out too fast. Maybe I am using too much and that is allowing things to get sucked back into the joint. I'm not sure what else to try here. The next two joints will be the front of the tank and the worst to mess up so I am hesitant to go there until I can get some respectable trial joints.
Thanks again,
Dave
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