My BR85N and M20 are DFT templates. Base structure is puzzle mat, and craft foam to build up for details. If you're gonna try that, I'd suggest having one full template to see how things are supposed to work, and a second that you cut up for each layer of craft foam. And keep reference images handy, just to make sure you don't put a cutout where it shouldn't be or vice versa lol Made that mistake a couple of times