Tony
I have not yet released the Holloway Performance UN1 kit so no one has it installed. The delay: upon completion of heat treating the primary shafts, we had them magnafluxed and they did not pass QA standards. All primary shafts are being cut again from new alloy. Bottom line, the manufacturer (EMCO) knows how the parts should be machined, QA'd and assembled.
I am sure the GTO kit is first rate and I am confident that the Holloway Performance kit will also be the highest quality. The manufacturer, EMCO Gears in the US, is a race only supplier that I have formed a relationship with for the UN1 upgrade. EMCO supplies gearboxes for IRL, NASCAR, American Lemans and Rolex series. In fact, every one of their gearboxes (6 total) completed the 24 hours at Daytona in February with no failures, including 1st place in GT class (black Mazda Rx-8).
I respect everyone's decision to wait for others to experience and comment on the kit. I hope to get it in my 2001 Esprit soon. I do have many of the kits pre-purchased so the feedback should be coming in the next months.
Kind regards, Craig