Cool, Ben. Thanks. I'm wondering what part you put in to get 13 cents
each at 1000 parts. That would be very attractive, but I keep getting
over a dollar a plate for 3" diameter semicircles with a tab/hole for
the shaft, for rotor plates. Admittedly, the 0.063" aluminum thickness
is more than needed for many applications, but dropping it to 0.024"
doesn't help a lot. I don't figure that making your own cap for low
power applications is going to be very attractive, so I'm figuring the
larger sizes. Also, what machining technique did you pick?

Cheers,
Tom