I love the control box! It's so much easier to fix everything to MDF than mild steel or aluminium and makes future changes a lot easier. It also allows you to concentrate the funds where they make a difference rather than just spending money on something that looks good. I've never quite seen the point of making one-off home constructed machines mimic professional, mass produced factory built versions. The priorities are completely different.
The only possible problem is electrical noise, a discussion going on elsewhere on the forum. This is something you can address with additional screening and appropriately placed capacitors if and when it shows up during testing.

Kit