Actusreus, I suggest calling VPI. After reading your post, I recalled my email from VPI and my info is correct based on the email from Mike.
With respect to the MintLP, Yip fabricates the protractor based on the information that the "end user" provides him. VPI has confirmed that the info on Vinyl Engine is wrong. I would not be surprised to learn that a lot of MintLP protractors have a S2P distance of 262 based on the incorrect info on VE.
VPI has also confirmed that the overhang is 15mm, therefore, just add that to the S2P distance to get your effective length. S2P 258mm + 15mm = 273mm effective length.
Again, all of the above info comes directly from VPI
With respect to the MintLP, Yip fabricates the protractor based on the information that the "end user" provides him. VPI has confirmed that the info on Vinyl Engine is wrong. I would not be surprised to learn that a lot of MintLP protractors have a S2P distance of 262 based on the incorrect info on VE.
VPI has also confirmed that the overhang is 15mm, therefore, just add that to the S2P distance to get your effective length. S2P 258mm + 15mm = 273mm effective length.
Again, all of the above info comes directly from VPI