IMO, the XCU would have been fine if all we used was rotary push spreaders but that's not how we get our work done here.
The product I am using presently is manufactured by Mears Fertilizer out of El Dorado, KS and is distributed by Ewing. Very clean.
If it is dusty, I wouldn't use it in my ride on no matter how long the green lasts...but that's me. I'm done using dusty fert for the sake of a couple of bucks a bag.
"The Poor Fish" circa 1930's: The Poor Fish wouldn't have been caught if he'd known enough to keep his fool mouth shut.