vpi JMW arm lengths

No. Even if you could merely plop any wand on a base, you'd royally screw up the P-S distance and overhang.

Yes, you can use any base and any tonearm i.e. you can use a classic base with a 12 inch arm, BUT you will need to reposition the base to the correct S2P distance for EACH arm with varying lengths.

Also, please note that some older bases have a too small of a "dogleg" that will not allow an arm with side weights to clear the vta tower.

I have seen a Classic table with a classic base and a 12.7 wand and the base has to be re-mounted to the extreme edge of the plinth. Not a good look.

Brf is technically correct. But he also confirms what I wrote.

Even assuming you are willing to move the base, it would be helpful if VPI had a kit. For example, I switched out my Classic 1 tone base for the Classic 3 base. VPI sent me a kit with the tools, jigs and templates needed to correctly position the Classic 3 tone base on the regular Classic 1 plinth. Further, they also provided me with a special platform base to cover up the hole in the plinth from the Classic 1 tone arm base.

If this is something you really want to do, call Mike at VPI and ask him if there is a kit. Otherwise, you will be going DIY all the way and you're on your own.

Been there and done it. Call VPI.

Bruce

Not worth doing. I went from a 9 sig to 10,5i....if there was a difference, I really couldn't tell.

I think different generations of JMW arms sometimes use a different pivot structure. I don't think my original JMW-12 would fit on a modern base. Or at least so I've been told.