VPI JMW 9" and Rega P6 Tonearm Mounting Holes


I am planning on buying a new 9" tonearm that I am hoping will fit both my VPI Scoutmaster and my Rega P6.  The Scoutmaster currently has the JMW 10.5" tonearm on the VTA adjustable base so it is impossible to tell exactly how the plinth is drilled but my assumption is it has the same hole diameter and screw hole placement as an Aries Scoutmaster that uses the JMW 9 tonearm and I believe (?) that is the identical screw placement and hole size as a Rega P6.  Can anybody confirm that is actually the case?  I really don't want to have to unmount the tonearms on both tables just to take a simple measurement. 

pinwa

@mijostyn Why do you doubt VPI uses the 222 mm standard?  My old VPI Aries Scout measures at 222mm pivot to spindle using a Feickert protractor.  I would have assumed they would have kept it the same for the newer Scoutmaster.  And it is really the spacing of the screw holes around the hole that is bored through the plinth that I am curious about and whether they are the same as the Rega standard.

@pinwa 

That is the spindle to pivot distance. VPI arms have a VTA tower which mounts to the plinth in a different location and the wire exits the arm above the plinth. A Rega arm uses a bearing spindle which mounts through the plinth the wires exiting below the plinth. I am certainly no expert on VPI arms as I severely do not like UNI pivot designs. The question is, once you remove the arm, what is left on the plinth and where is it in relation to the spindle. If you have any arm that mounts through the plinth at 222 mm they are interchangeable although the hole size might be a little different. But, as soon as you change the spindle to pivot distance you have to drill a new hole in a different location which is why having an interchangeable tonearm board is so nice. If you are looking for a 222 mm arm I highly recommend the Schroder CB.  

@pinwa 

The Blackbird is a brilliant arm, ugly but brilliant. I might get one myself. My table has removable tonearm boards so I can swap tonearms in a heartbeat.