Hawaii, your truck looks great, and I am using it as the inspiration for the pending bob of my recently acquired 925A2. Your attention to proportion is admirable, and you did make it look too easy so I'm breaking out the torches soon....I think.
I have been diligently measuring mine and photoshopping it with different length beds and side-rail configurations, and I am running into a discrepancy in my calcs vs my photoshopped results. You stated that your bed is 11'-9", but it looks like you did take out only one section of the bed side rails. Is the 11'-9" a typo maybe that should be 10"-9"? I can't get 11'-9" to look right (like your bed!) in my altered pics. Or, did your bed start out at 15' long?
Also, I have a question regarding turn radius that I'm hoping you or the other guys can help with. I know you are happy with your radius as it is definitely shorter by removing the rear-rear axle and leaving the front-rear in its original location. As my truck is a 925, I don't think my sense of proportion gets satisfied by leaving the proposed single rear axle so close to the front axle .....the truck will just be too "front heavy" (aesthetics because of the winch, not tonnage). I think it looks best, for mine, when I put the single axle exactly centered between the two original rears locations. This puts the tire directly under the center "bay" of the bed, with one "bay" removed from the length, because I plan to leave the spare/davit/muffler in the original configuration.
This leads me to my question: will the turn radius be any different with one centered axle than it is now with the tandems? My theory is that it won't, because it seems that in a turn the front-rear axle scrubs a bit the opposite way of the rear-rear......both moving opposite ways from each other around a pivot point centered between the axle-lines. I hope I'm wrong because I would like a shorter turn radius, but I will appreciate any feedback from those more learned than I.
Thank you for your help!