Were those three railer chains you were running? Or separate wraps in pairs?
Wasn't really running the right chains at all. I knew I was going to change my tires size so I only carried the standard chains for the old SRW truck I had that are too big for the smaller tires this truck came with. It only covered one tire of the dually and was hard to get on as its not meant for it. Originally only carried for extreme circumstance if we had R3 conditions or something, but figured it could help so I threw them on AFTER I got stuck.
Getting back to those fuel tanks... who made them? Did the aft axle tank retain the factory skidplate? How did the extra 10 gallons get squeezed in?
Aerotanks made them for me. For the aft he actually got more than 10 gallons, because the stock wasn't quite what Ford claimed. I don't remember for sure, but I think it only took around 34 gallons or something even when run really empty. He brought the tank to the extreme dimensions of the frame on all sides and made it come up a little bit through the frame rails. No factory skid plate. There was a double wall skid plate welded to the bottom of the tank, flush. I was skeptical because I thought the skid plate should have some space between the tank, but he claims they have taken some pretty serious hits and not punctured. I carry a stick of the fuel tank JB weld type of stuff just in case.
And the midship tank... how was that mounted? Does the midship tank extend forward under the cab, or does it stop at the cab back wall? Were factory straps used, or custom straps? Where was the DEF tank relocated to? You have side boxes on either side of your bed that intrudes on the space of the Ford side saddle mounting option...what was your work around?
The DEF tank was a huge problem when adding midship tank. Ford sells a midship tank but they move the DEF tank to the outside of the rails when they do, mine is inside the rails as it didn't come with midtank and its actually where it needs to be for my boxes like you said too. I had a hard time deciding whether to do a delete kit and remove it to get even more fuel capacity, but my warranty for sure would be voided at that point.
Aerotanks claimed they could get 25 gallons by mounting the midtank in front of the DEF tank, extending the midtank under the cab as far as possible to the transfer case. They used their own mounting system. They brought it down to about the level of all the other components.
Also added a light duty skid plate to the DEF tank as it looked vulnerable.
Got any pictures... not of the gorgeous red completed bed, but the frame and especially the fuel tank guts underneath that 20K custom aluminum body?
I didn't get enough photos as it was being built out of state, the only place I could find that did aluminum custom beds to fit campers. We communicated about design through 3D cad drawings that I still have. We went with 4" rails to get the camper closer to the cab and reduce height.
As far as fuel tank mounting, the mounts have nothing interfacing with the custom bed. When I took the truck to the builder they were already mounted and installed. Snapped some photos just now but can get more later when it isn't raining.
Here's a couple shots of the 3d cad underside:
I'm happy to answer any questions that'll help. I got so much of my knowledge off of this forum that its nice to give back a little.