The CGEM I had was really worse than yours Logan in both axes. No matter what I tried, it just would not improve. The answer apparently is the hypertune kit available in the USA, as the OEM gears and worms are not the best.
https://www.deepspaceproducts.com/hy...4227_8666.html
I could see with my own eyes how much wobble/oscillatory motion there was in the RA and Dec gears when NOT meshed to the motor - so out of spec to be unacceptable.
The kits aren't cheap, but they are pretty much the only solution if your gears and worms are as out of spec as mine were. Not much help, but it's the best you can do with these short of rebuilding it entirely.
Mine simply would not reliably guide with PHD or MaxIM. MaxIM's algorithm was having hissy fits, telling me X didn't move, then next Y didn't move and so on - SO much backlash despite fiddling.