If you truly want to go with the Phantom Mk ii and the HRX, that is your decision. FWIW, I consider the Phantom Mk ii the best non-table specific pivoting arm made. If yes, I would suggest you contact VPI and speak with Mike.
I recently mounted a Graham Phantom Mk ii on my TNT Mk IV using a Bob Graham custom arm board - spoke with Bob directly, gave multiple measurements, etc. While incredibly well made, it did not accomodate the Phantom and Bob's cost for re-machining an already expensive arm board and providing a sub-arm board (yes, it was too thin) was prohibitive.
I called VPI, talked with Sheila and Mike and they offered to machine the arm board FOR FREE - I just had to pay shipping to/from and of course buy a very reasonably priced sub-arm board. They offered to machine something that wasn't even their arm board! I made a donation to their foundation as a show my appreciation.
You cannot go wrong working with VPI. Very good people.
Brent
I recently mounted a Graham Phantom Mk ii on my TNT Mk IV using a Bob Graham custom arm board - spoke with Bob directly, gave multiple measurements, etc. While incredibly well made, it did not accomodate the Phantom and Bob's cost for re-machining an already expensive arm board and providing a sub-arm board (yes, it was too thin) was prohibitive.
I called VPI, talked with Sheila and Mike and they offered to machine the arm board FOR FREE - I just had to pay shipping to/from and of course buy a very reasonably priced sub-arm board. They offered to machine something that wasn't even their arm board! I made a donation to their foundation as a show my appreciation.
You cannot go wrong working with VPI. Very good people.
Brent