Good news. I put 440 lbs. (my Son and I) on the front of the bed and it lifted us with no problem. He was able to stiff arm one of the rafters and stop it with both of us on it. Didn't load the engine so I'm thinking the by-pass in the hydro is opening. I'm guessing it will dump anything I plan to haul. Takes 3 1/2 seconds to go from horizontal to almost vertical. Much faster than I ever imagined. I will try taking a video and post it here. I may need some help. Hint hint.
That's great. Remember, you'll be adding, about 100lbs of dead load by the time your done.
Maybe you should fiddle with the relief valve now, as it may help you determine how much dead load you can add.