My Reduction

[Paul Birkeland]

Oddly enough, I've had very good luck using a hole saw to cut through sheet aluminum.  You'll want to clamp the piece to a piece of plywood so you have something to drill into, then use medium speed, low pressure, and some cutting fluid (WD-40 seems OK) to keep things lubricated, cool, and clean. 

If you get a piece of steel by accident, I wont' be able to help you much there

 

[corndog71]

It was a good weekend to make some changes so I thought I'd swap in my Russian caps for fun.  I used K40Y-9 PIO 0.01uF, and K42Y-2 PIO .1uF and .47uF caps.  I wrapped the metal-bodied .01 caps in teflon tape to be on the safe side. 

Ok, I'm becoming a believer in these PIO caps.  They're still breaking in but right away they sound terrific.  Not really missing the V-caps I had in there either.

 

[Paul Birkeland]

Nice touch on the Teflon wrap!

If you can find them, 100+V rated polystyrene caps are nice for the EQ.