Well that last part was beyond me, except he made a perfect template with a lot of measurements and then cut the sides out!!!!! hahaha
I have a much more basic question please, what is the point of the cardboard insert into the sides, I have not see anyone do that before? I thought maybe to help maintain shape, but then I did not think the cardboard would be strong enough to really do that?
Then I remembered the videos from the last builds you guys did, and thought maybe the cardboard was after too much paint thinner fumes or something

