Graham will cut a hole for you to mount his arm last time I checked, but cost of this service is quite high due to large amount of metal VPI uses in the plinth. If I recall correctly, it's in the neighborhood of $500.
If you ask VPI, they will question why you want to go down that route since they are confident JMW 12.6/7 is equal or better than Graham Phantom II.
If you ask VPI, they will question why you want to go down that route since they are confident JMW 12.6/7 is equal or better than Graham Phantom II.