[Ed_Dinning]

Hi Josef, You can make your chassis using car repair plate (galv steel) and it sprays up nicely. It is usually thin enough to fold in a vice.
Don't be put off by the metalwork as the material is low cost.
For larger holes a "cone-cut" works fine.

If you get into it big style it is worth investing in Q-Max chassis punches.

Have you tried any model engineers in your area, they could probably make up a chassis for you easily.

Ed