Makes sense. Thanks for thisUBJ removal - cut off the pin and it gives you room to push the UBJ up and out into the receiver cup on top.
New UBJ install - you are now pushing down and in. Since you don't need the receiver cup up top any more, you can use the full spread of the jaws to make room for the bottom pin. As long as they have a hole in the middle you can stack cups to accommodate the full length of the new pin. The press orientation is the same, you just use the cups differently.
How did you remove the circlip on the LBJ? My new circlip pliers don’t seem to reach the wide ends of the circlip.I used the hammer method on my LBJ and was very surprised how quickly and easily it came out.