The RA extension worked out for me, but this was with a different OTA. But this is what it is intended for, to give some extra clearance. Going higher vertically may not help the clearance in the same way. But what I especially like is being able to break the RA into two pieces with the thumbscrews, which splits the mount into 2 sections for lower weight and smaller sizes, for set-up, tear down and transportation.?
