Re: BX22 and 72\" Rear Blade
Snowman, a box blade works about the same way as your tiller and FEL method, or it accomplishes the same thing in a different way. The box blade has scarifiers that tear up the ground about 3 or 4 inches below the surface level and the trailing blade, surrounded by the box, work to drag the dirt.
I totally agree that a rear blade is not very effective as a dirt implement in many cases. I have hung up my tractors after the blade catches too much ground and simply lost all traction. Sometimes there is no substitute for a simple blade, but often jobs are easier done by something else.
As for the issue of moving snow with a BX and a 72" blade, I still think it is too much blade for that tractor, however, a lot of it depends on the amount of snowfall and the type of snow. Certainly a lot of fluffy snow can be pushed, even if it gets deep. But a good heavy wet snowfall will probably stop the tractor pretty darn fast, no different than biting into too much dirt.
As for the issues of Kubotas with wheel weights, I say bunk. Or bull. Or pick your term. What is the difference if you fill your tires with fluid or if you add wheel weights? Either way the axel and 4wd mechanism are dealing with a couple hundred extra pounds on the rear end. I have cast iron on my
B2910 and I have steel bar on the front wheels of my NH TC24D. Both are better tractors since adding the weight and neither has had a problem due to the weights.