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Phantom custom mount on SME slot?

I currently have a Graham 1.5T mounted on a VPI TNT using an SME type mount. There is a Phantom with the Graham custom base available to me and I'm trying to determine if the custom base could be used on my current armboard with SME cutout.

Centre of the SME cutout is the same as the custom base ~8.5" from the spindle and width of slot is about 30mm.

Thinking it should be possible to mount over the SME cutout and just drill the new holes required by the Graham base.
This would save me getting a new armboard in the short term.

Wondering if one of the forum's Phantom owners, with Graham custom mounting base, could measure the diameter of the base and the distance between mounting holes?

Also interested in any opinions on whether the Phantom Custom base is better/same as SME mount sound-wise?
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Showing 2 responses by tobes

tobes's avatar
tobes OP
436 posts
 
Phantom, 2.2 and 1.5 all share the same effective length of 235mm.

All I really wanted was the hole spacing on the Graham mount. Someone on another forum has advised the holes are spaced 90 degrees on a 2.200" bolt circle.
This gives about 40mm between hole centres - making it a tight fit over the slot. If bolt nuts are attached it looks like they may slightly overhang the slot. Aesthetics aren't going to be great either, as old bolt holes and some of the SME cutout will be visible.

My best option (of course) is to get the Phantom with the SME mount and avoid any issues.
tobes's avatar
tobes OP
436 posts
 
I've pretty much decided to go for SME mount Phantom. Saves the hassle (and expense) of sourcing a S/H Graham drilled armboard. With the demise of the TNT, armboards no longer appear to be carried by the online retailers either.

Thanks all for the input.
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