So, I made a start today, bending some brass. First on a metal brake, a 90 degree bend.
This is further tightened in a large machinists vise, protected with some scrapmetal of course.
Pushing on the handle with all my might, I didn't get any further then this.
Well, it doesn't look like much yet, but it's a good start. Good enough to encourage me to order the saw steel plates. I won't continue until they have arrived, so I can take a big hammer to smash everything flat, with just enough space to clamp the sawplate.