[Lord Erak Grimnar]

Originally Posted by Lord Commander Erus

I take, for lascannon, a thick bladed exacto, heat it up (I have a heat resistant handle, it's called a welding glove!) and poke through the tank then twist in a circle. Repeat to a smaller knife to smooth out edges, and presto! Lascannon hole. You can also just use the edge of any knife that is heated to it and carve out a disc from it, but it looks too clean for my tastes.

Nah like Wolfpac said soldering iron or heat gun. You need a melted look as I think lascannon is like a large laser that melts through everything.