Today I made and mounted the Hacker firewall. The first thing I do is trace out some blue foam cut it out and use it as the template. You will need to cut a little at a time so you don't get it to small. after you get the template where you need it, trace it out on to what you will be using for the firewall. (I used the 1/8in carbon sandwich panel from CST.) when I get the carbon where I want I will tack it in place with some CA to hold it in place. I then take the motor and get it set then mount it. after all adjustments are made I will glue the firewall in using BVM aeropoxy.