Or, you could just ignore it. A small amount of imbalance is totally harmless
Actually, a small amount of imbalance is preferred - especially if you are imaging.
Most of us using GEMs have learned to keep our scopes off-balance in order to keep the gears properly engaged. And the predominant way for the imbalance is to use the "East Heavy" method. By that, I mean that if you let the rig go, it will slowly drop toward the east side of your mount. We do this so the gears engage properly and the worm gear will "pull" the spur gear to the west.
To adjust the RA axis, I raise the counterweights about an inch when I am looking to the west and I lower them an inch or so when I am pointed to the east. For the DEC axis, I prefer 'back heavy' and your SCT should be back heavy with the mirror and imaging gear on the back.
All mounts have a small amount of gear play and if your scope is perfectly balanced, it can "bounce" back and forth between the gear faces. It's annoying as heck for a visual observer and disastrous for an imager.