Interesting that you have the same Transport Bottleneck, although I've had mine modded, and TBH it's a shadow of it's former self. It's had a Trichord Clock 4 & NCS, improved PSU for the servo, and a small mod on the Digital Out, not sure what, probably just better caps ? Anyway it's certainly a million miles away in terms of preformance of the bog standard 500 Mk2 transport which I started with.

Bottleneck has your 500 been modded ?

And would you like to have a lend of my CD-R Comp ?

Also the same thought has crossed my mind in regards to 9designs thoughts, must be worth checking out Zanash, as it does seem logical or possible in regards that later tracks could see a bigger improvement?