Ok, I looked on the Panamorph Website and it says:
How far from the screen does the projector and UH480 lens assembly need to be mounted?
First, there is the issue of focus. The UH480 lens is engineered to give optimum sharpness and full graphics level performance when mounted between about 14.5’ to 17.5’ feet from the screen. This was a deliberate design choice, as experience has shown us that the vast majority of projectors are installed within that mounting distance. Mounting the lens within those limits will reveal full 1080P pixel level sharpness even with critical test patterns. Practically, however, the UH480 lens can be used from about 12 to 22 feet without any noticeable loss of sharpness with even high definition movies. For those wanting "pixel level" performance at distances greater than 17.5’, we offer optional UH480 Long Throw Conversion Kits at an additional cost.
So, it sounds like I am close to the border of what might work. Time to remeasure distance.
JVC RS600(Fantastically calibrated by ChadB), Stewart Cima Neve 2.35 115" diagonal screen, Darbee Darblet, Denon AVR-X7200WA(7.6.4), M&K Speakers, 6 ported 18" subs powered by 3 inuke 6000dsps, 2 Behringer B1200D Mid Bass Modules, Buttkicker transducer, Oppo BDP-93 blu-ray player