You are ignoring that OP bought an Ortofon Cartridge, thankfully the height is designed to match Rega's 14mm height so no shims are needed, thus VTA should automatically be correct.
"I just purchased the Manley Chinook Special Edition MkII Phono Preamp and the Ortofon 2MR Black LVB 250 cartridge"
However, it has two holes, located in it's body, perhaps differently than Rega cartridges.
https://cdn.shopify.com/s/files/1/0756/9247/4651/files/Cartridges_Dimension_Chart.pdf?v=1756199293
So, the auto locating 3 point attachment that Rega has designed will not automatically locate this cartridge.
Thus, what I am asking for is NEEDED to do it right.
Anyone with a RB880 Protractor could simply measure the distance from centerline of spindle to the two null points on the protractor, and TELL US!!!!!!!!!!!!!!!!!!!
It seems to me that everyone is so busy resisting my request and I am simply saying: "I could not properly mount his cartridge without knowing the two null point distances"

