EMI Rehab

Hi all,

I'm putting my Sherline/Xylotex setup through some EMI rehab, as the
mill has been out of use for a little while, but I'm now planning to fix
it up for either small precision work, or to sell (I'll put it here
first..) Anyhow...

I decided I want to take the EMI thing rather seriously, so I shall be
fabbing up a huge metal casing for the whole setup this weekend, here is
what I'll be doing:

.1 main case around everything
.Power-supply enclosed in it's own metal case inside of the main case
.Main case partitioned in two with small holes so the logic/power side
is separate (with big distance between) from the AC side.
.I have an EMI filter unit for the AC in
.Installing capacitors on the Xylotex step lines to ground

So as you can see, I'm very annoyed with random steps/stalls!

Here is what I'm not sure about...

.I have 0.68uF 450V caps for the sherline DC spindle motor, as listed in
Cletus' EMI solution. But the diagram shows 3 wires going to the motor?
I was sure the Sherline had only 2 wires as it was a DC motor? How do I
wire these caps over the motor's brushes to reduce EMI? Or was this
diagram for an AC motor only? I'm a bit scared to just start soldering
caps wherever looks good!

.Grounding.. foot bones goes the uh.. leg bone, leg bones goes to the..
uh uh oh! Okay, so the chassis will be grounded, the EMI filter ground
is common to the chassis ground (well, it's connected actually) but what
about the parallel port cable? Do I ground the outer shell of that to
the chassis, or leave it off? Wouldn't grounding this cause the cable to
be grounded at both ends (PC and controller chasis) and therefore cancel
out the effect?

.Is it going to be terrible to mount the sherline on top of this new
casing? From an EMI point of view? It would seem to be a nice idea to
have the sherline, with controller, as all one unit.

.Any other tips or morsels of EMI wisdom you want to share?

Rehabs for quitters, anyway. :)
~Abby