I got a used "MEGS" tip at a muffler shop, it was laying on the floor after being cut off of a Chevy 4X4, had the muffler shop weld a pipe and flange on, $20.00 total.
It was really long, so I ran my first event with it long and then cut it off at the Flame Ring- the clean spot inside that indicated exactly where the mixture was exploding- and made a quick cookie cutter and welded it in.
It's just like everything on my car, cheap and home made. I didn't use any plywood.
It's not all rusty like it looks in the picture, weird picture.
The really cool thing is that it spits a ball of flame out every time I shift! Thanks, wild cam.