Ppfffffllpp.....that’s amature work. I could do the exact same thing with an Exact-O knife and a straight edge.
Sure it might not be exactly the right size, the curved sections may be off a little resulting in leaks, and let’s not forget the occasional slipping when the blade catches a soft spot in the material resulting in slicing my hand open which just happened to be downstream of the blade, and then when the better idea to use tin snips comes into play the real accuracy is thrown into oblivion.
So yeah, like I said, how much does your brother charge for this!?
Cool stuff!
Cheers
Dave