I run the gate and wings to get the extra 2' of support on both the 929 and 817. I haul materials like construction debris/ I recently hauled about 30 loads of stone from a basement after I took the building down. I never weighed but was probably close to design max. The 817 is gone, but It did fairly well for stability with a load, having the duals. The 929 I have now had 14.00 GT AT2 that under load, were scary. Now I run the 395 Michelins. Went from 9700#/tire to 12,500 and smaller diameter with a wider contact surface.
If you have a 925, that would make a great donor but with the extra length, you can overload it.
If you have a 925, that would make a great donor but with the extra length, you can overload it.