I wouldn't buy a jet agitated machine either, that's why we have a TurfMaker 425 and a Bowie 1100. The Bowie has a diesel engine, I sometimes wish the Turfmaker had a small diesel.
I do wish that somebody would come up with a non-corroding mechanical agitated machine. I know some manufacturers are making stainless tanks but I can show you a bunch of corroded stainless steel at the seawater treatment plant I work in.
There must be a way to make a mechanical agitated composite (some would call it plastic) machine???
We have some of the opposite problems from Rick, some of the northern regions of Alaska have permafrost underneath and if you put on more than 1000 pounds per acre you will insulate the ground and cause the seed to be too cold to germinate. I was told this drove the DOT engineers crazy until they figured out the problem.