The Rega cartridge alignment, using the three hole system, does not conform to the maths of the, commonly accepted, Baerwald alignment, the inner null point being moved closer to the lead out groove. Having owned many Rega decks over the years and using them with both Rega, as well as other, cartridges, I can say, without hesitation, that Baerwald alignment has been preferred by these ears in every instance. The first thing that I do is throw out the Rega paper protractors.
The reason that Rega installs cartridges nuts up is that the grooves around the mounting holes in the tonearm will snug the bolts so that it is easier to torque the screw heads without slipage. So long as your dealer used the Rega torque wrench, the installation should be consistant with Rega's preferred installation, nuts up or nuts down.
The reason that Rega installs cartridges nuts up is that the grooves around the mounting holes in the tonearm will snug the bolts so that it is easier to torque the screw heads without slipage. So long as your dealer used the Rega torque wrench, the installation should be consistant with Rega's preferred installation, nuts up or nuts down.