"Bill" wrote:
snip

Is a jig saw less likely to create nasty tear-out here than a
circular saw?

Yes, if you use a 10 TPI Bosch blade and some masking tape.

Also, aluminum angle should be at least 1-1/2"x1-1/2"xx1/8"x96".

I use a 2x2x1/8x96.

Lew