I think it might work well on the bx but have no experience with it.
Someone once told me he used a standard size sub soiler on his bx, and it worked, but he had to disconnect the top link at the end of each pass so he could get the subsoiler out of the ground and turn the bx around...
The XB series is (as far as I know anyway) designed to work with the smaller type cat 1 3PH like is found on the BX.
One advantage is that this item is it is both a middle buster and a sub soiler...depending on which tip you use.
I think it would be worth a try. Mabye someone who has one will speak up..