I have the LP0560 on my BX and did find the similar situation with the top link adjustment being limited. One question though depending on how old your BX is is if you have the shorter top link on yours. The early BX's had a longer top link which was too long for just about everything you tried to hook up to it.
Now if I had the chance to buy a Landpride blade again I would go with the 1560 instead of the 0560 which is based on a category '0' hitch with cat '1' pins. The problem I did find was in the geometry of the top link which was too low and caused the blade to want to pivot down and grab or dig in too much and was hard to control. My solution was to modify my blade by adding to the height of the top link connecting point to increase the dimension to that of the cat '1' configuration.