I might be changing course here slightly...
This picture shows the OEM lower triple clamp sitting on top of a 929/954 lower triple clamp.
It is not a gull design, but is otherwise similar to the RC51/SP1 lower triples--apart from one other thing: it uses the exact same bearings as the VFR. When I test-fit the SP1 triples the top two clamping bolts contact the inner fairing at what would probably be the end of travel (if the steering stops were functional--see the picture below). But is does appear that the flat 929 triples would not present any clearance issues at all. So, why am I using SP1 triples?
With the 929 triples I could use the VFR bearings, and because the new VFR bearings are the same size as the old VFR bearings, there is no need to mess around with snap rings.
I would have to shave off the 929 triple's steering stops to clear the VFR headstock--same as with the SP1 triples. But, unlike the SP1 triples, the 929 triples' top surface is flat, which would make fitting new steering stops in the correct place an absolute doddle.
I could use the 32006JRRS2 lower bearing with the integral seal...
Sounds good to me so far, but what could scupper the idea for good would be if, once the forks' height is adjusted correctly, the flat 929 lower triples do not clamp the SP2 forks in the 50mm machined area (this is only an issue with SP2 forks--SP1 forks have a continuous 50mm clamping area). It's complicated to measure everything in advance, so I may have to suck it and see, potentially wasting some lower bearing sets, but that's probably a risk worth taking.
Stay tuned...
Ciao,
JZH