VPI motor - upgrade to 300 rpm?

Thanks! I think PRAT is what I am looking for, and want to try the silk thread variant. What kind of basic knot do you use?
The question remains, what is the best motor, is there a sonic profit with 300 rpm? Since no-one here has answered, I have mailed VPI about this.

Please keep in mind, that VPI is on vacation till Jan 11 I believe. Mark

Here's a thread discussion thread (sorry, I couldn't resist) but there are others and some that have on-line sources quoted.

http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1264987921&openfrom&1&4#1

I have not made an unbiased comparison between the 300 and 600 rpm motors, but years ago when I looked up specs for the so-called upgrade, I noticed the 600 has twice the torque - that's quite a difference. Of course, there is probably a price to pay for that, likely vibration, but with all the talk years ago about the torquey idler drives, I kept the 600 and made myself a pulley stabilizer/flywheel which goes in front of the pulley and tensions the belt around the pulley 180 degrees - all without increasing the overall belt tension. I can just turn my motor on, no pushing, and the platter starts to spin at speed immediately, and that's how torquey the 600 motor really is. I have only 1/4" of belt on each side of the pulley/flywheel, which means it will have very little stretch - compare that to the stock 6" length and 40 degrees of contact.

And, of course, it sounds way better. Why VPI doesn't do this I don't understand.

Sorry, can't link a pic, but I'll try to figure something out.

Today I got this reply from Mike at VPI:
"The 300 RPM motor does not work on the HW-19 so that is not an issue. The 600 RPm motor should work perfectly when you get the capacitor right for your countries voltage and frequency, it is a critical item and if you are willing to play with different values you can fine tune the motor for lowest noise and running smoothness. Mike"
No use running after a 300 rpm motor, then. Capacitors, here we come. Has anyone tried?
Storyboy, this sounds very interesting, can you explain a bit more ("in front of the pulley and tensions the belt around the pulley 180 degrees")?
Amazing what one can achieve with further improvements like these...