Originally Posted by Jason Turk
Okay guys...good news...tested and RS50 with various mounts...bad news...NONE fit. The Chief RPAU/RPMU (same basic thing from the plate standpoint) miss the unit by a TINY fraction...I cannot even tell you how irritating it is. An installer could probably figure out a mod, but it is far from perfect.
There is a possible solution but I am not going to mention it until I confirm it is valid.
Also, I am working with Chief, but, there is no solution that is going to be quick.
Might I suggest the Peerless PRG-EXA (or EXB/EXC). This is the mount I've long used with my PRO-FPJ1 (RS-2), and based on the specs, it ought to just about work with the RS40 (and presumably 50/60).
Take a look at following schematic: http://www.peerlessmounts.com/pcatta...6-9626-1-1.PDF
The max (point to point) distance that the 'spider' legs can accommodate is 17.63". The diagonal for the RS 40 mounting holes is precisely 17.5". That doesn't leave much in the way of wiggle room, but if we're referring to distances from the centre of one mounting hole to the centre of the other (which schematics typically do), the mount should work.
Put another way, if you're prepared to (ahem) 'expedite' my RS-40 pre-order, I'd be more than happy to get back to everyone asap with whether this configuration works - which should in turn allow others to order mounts well before the multi-week lead time Chief likely requires to get product in the hands of dealers.
I should mention that the PRG-EXA is a nice bit of kit, with great flexibility to fine tune (and then lock -in) pitch roll, yaw, etc.