That's the point of a vasectomy...
Put the weight on the backside of the scope.
In my experience and opinion, the problem is more than simply balance. It's about controlling the center of gravity. As the tube rotates in altitude, a displaced center of gravity relative to the horizontal altitude axis will cause the scope to move uncommanded toward the zenith or horizon, depending on where the COG is as weight is added or removed. It's best to pull the COG closer to the altitude axis and reduce the net lever and arm it presents. (The scope will not rotate on the z axis against it's own altitude bearings, so only x and y COG position need be considered).
IMO, the best way to do that is to place the counter weight on the bottom of the tube opposite the focuser, heavy eyepiece, and finder(s). Just as Jon illustrates above. I try to show the problem with the COG in my illustration below (experimenting with a belly weight, ignore it). Friction (not stiction) needs to hold the scope's displaced COG. In the illustration below, the scope would only be "balanced" when the COG is directly above the altitude axis. That's precarious, we need sufficient friction to hold the scope over a range of altitude motion. Large trunnions are nice.
Edited by Asbytec, 27 October 2020 - 06:03 AM.