Michael,
These arrived yesterday and were installed today. I believe I can detect improved bass response from my RP3 (which also has your adjustable feet, double belts and pulley, and a number of other tweaks). Listening right now to "Neil Young Live at the Cellar Door," I feel a stronger presence and intimacy to the performance. I don't recall what other users have reported but the improvements more than justify the modest cost of the base.
I was very impressed with the quality of the product, and with the clever engineering that re-uses existing parts to make installation pretty simple. It took me about an hour and half, and quite a bit of that time was spent peeling of the remnants of the double-stick tape that held the motor to the plinth.
Here are a couple of thoughts on the installation process that might be of interest:
1. I was surprised that nothing I saw on your website or in the instructions you sent mentioned the requirement to cut the existing power switch wires and solder them to the new switch. I'm not the most skillful solderer but this was simple enough.
2. The leads on the motor wires limit the distance from the motor isolation base to the PC board box. Everything worked, but reaching the little switch might be a problem for users who don't switch the TT on and off elsewhere.
3. I use Rega's wall-mounting bracket, with an MDF board in the open space between the three foot platforms and the rails supporting them. Fortunately the isolation base falls within the perimeter of the rails.
4. Included in the kit was a white foam disk about 100 mm in diameter. I still haven't figured out what that is for.
Keep up the good work!
Regards,
John Gallup
San Diego California USA