Marty, I had to go back and look at my old notes because I no longer have a Rega-based arm in my home. My son has one but it is doing the "Jazz Goes to College" tour! :-)
Anyway, like Dan, the VTA was of less importance than VTF. We set the VTA just a cat's whisker below level in the back and my notes say the "best" VTF was at 1.83 using my cheap digital scale. This was based on a "standard" thickness LP and the VTA mentioned. SO, your mileage can, and most certainly will, vary but that should get you in the ballpark. Let me tell you, it is nice to have a cartridge that you don't have to adjust VTA too often with the Rega arms. I would imagine that those folks who like to adjust VTA for each and every LP thickness would sooner have the crabs than a Rega arm. I am not quite that obsessive about VTA, but I do like the ability to adjust for differences in cutting angles and thicknesses on my favorites and when doing VERY critical listening. Even at that level of finicky, I'd strongly suggest the Pete Riggle VTA adjuster.