Trimmed and ground away the excess...
Started with the jig saw on the open end since its easier to cut smooth lines and makes much less dust..
Then moved on to the dremel with cutoff wheel..
Trimmed up with some light sanding..
Experimenting here to see if resin will stick to this IKEA cutting mat.. it's just about the right size and stiffness to help me mold the last side. I tried taping it up first but the tape wrinkles as it curves so hopefully I can keep it bare.