@RMM - sorry to fill your post with nonsense. PM me and I can delete with no hard feelings…
@wight - You’re right, those thin traces have held up well for the short lengths they must travel while surviving many 4 volt high amp ranges.
Alright, so here’s some FP math for you: 
My thoughts about the XHP70 were in regards to the efficiencies realized at the higher voltages. I had conjured an extension tube for a BTU Shocker without a cell carrier. Basically cutting the existing BTU battery tube in half and inserting another longer tube inside the ID of the BTU battery tube to lengthen it. After head and tail mods, you could stack as many 18650’s as you wished (only limited to the length of the tube mod and a suitable buck driver). I was considering a 4S3P tube config and a 12A 7135 based driver. So, 3 x 12V XHP70 in parallel driven at 4A each. Extrapolating from Crees data sheet (amps for 6V/2 = 12V version) djozz graphs net 4750 lumens @8A, 7.5ish volts (that should net 14,250 lumens total for 3 emitters. Pushing through the CN11770_IRIS with 90% optical efficiency nets 12,825 lumens OTF.
A 50 cal ammo can would actually make a far more suitable host since the shape would more easily accommodate cell fitment and active cooling. Oh hell, now we might as well just consider a 400W HID and go for some serious lumens and throw and not have to worry about heat sinking and complex circuitry. I think I’ll just go boating , drink beer and steer… before insanity sets in.