Regards, Rodman99999: No authority on the Q'up, it's my understanding that the auxiliary bases allow for broad matching of arm height, there are serations that couple the base and lifter body for smaller adj.'s. The tape is just added assurance that if the lifter is subjected to an outside force, it will be less likely to lose it's setting.
Do I know this for sure? Nope.
BTW, my "safety raiser" has a mind of it's own, I'm wondering if a drop of silicone fluid to the top of the cylinder might assist in damping the trip lever?
Peace,