I've looked online, but not seeing any actual reviews of how well these things work. One video shows the extra 12" of height and another shows some dude with their "beta" version, but nothing showing how they work in the real world. Seems like a massive upgrade for us BX folks:
The two videos:
HydrosPlus Lift+ HPBX300-BM for the Kubota BX
The HydrosPlus Lift+ for the Kubota BX will give you an additional 35% more lifting capacity as well as ~12" of lift height. The additional lift capacity comes from the 1/4" increase in bore size and the additional lift height comes from making the barrel of the cylinder 1.5" longer. This...
hydrosplus.com
The two videos: