I just bought and installed the BAL Lockarm which is on sale at PPL here in Houston. The BAL units have an L bracket which is used to attach to the landing gear near the bottom. I was able to use the front two Lockarms and the L brackets. However on the side units there is no holes in the landing gear front or back. I did not want to drill more holes. The L brackets are held in place with steel rivets. I drilled out the rivets and was able to bolt the side units to the same 3/8 inch bolt that the front units are attached to. See if this picture makes any sense. I have not camped yet but trying to move the trailer from side to side is now rock solid.
