A few comments: this thread started out with a 1705, and like my BX2200 you could run it for several days on a single 5 gal can of fuel. Paying over $600 to solve that problem baffles me. Now if you have several diesel machines around, that's a different story. In a lawn mowing BX2200 context I use the 5 gal can and see no problems. At the farm with 2 diesels I too got tired of lifting cans and did the following:
View attachment 487597
It's a 35 gallon insecticide tank. Change the gaskets out for ones that resist fuel, use fuel resistant sealer on the threads, and go. I run it to the filling station with an old Subaru station wagon, fill it and use the 25ft hose to gravity feed the larger tractors from a hillside or elevated spot. Since it does not run as fast as I'd like I installed a bicycle valve in the lid to the tank and can pressurize it for better flow. I also added a couple of handles to the top of the tank so I can move it (once it is partly emptied.) Someday I'll spring for a pump. Right now it beats carrying fuel cans. These tanks come in several different sizes and shapes. Fuel is NO PROBLEM in them but you do need to find fuel resistant seals for the hose outlet. This one was $99 at Tractor Supply.