Mike,
Actually, I don't think the rim drive in its current form could be used with the Aries 3. The Aries 3 plinth has a cut-out where the motor is placed. The dual-motor flywheel is a long, rectangular motor that is able to be used with the HRX, TNT-6, or Super Scoutmaster.
I started this upgrade from an original Scoutmaster, which also had a cutout for the smaller 300rpm motor. I had to upgrade the plinth to a Super Scoutmaster plinth, which has no cutout, before I could upgrade the motor.
But, to answer your question, No, the rim-drive is not an all-inclusive upgrade. The upgrade assumes you already have the dual-motor flywheel. The rim drive upgrade package only includes the new flywheel, and some belts and pulleys. This is why you have to re-wire your motor.
In terms of cost, I feel like VPI should have offered the upgrade in completed form, with the motor already tailored to the rim drive. Because I didn't already have the dual-motor flywheel, I essentially had to pay for the old belt flywheel, even though I might never use it.
And yes, you can't unscrew the cone feet very much at all before the table gets wobbly. VPI should have listed the mini-feet as a required prerequisite for the rim drive upgrade, if that's what it will take for me to be able to use the ring clamp again.
Question for those with the mini-feet... How tall are they? The cones are about 1 1/2 inches tall.
Cheers.
Tom