The_Shrike wrote:It was there before in a less intrusive way, but has been highlighted since we both changed to Nait 1s.
As a long term NAIT user I can attest that such cartridge faults will always be revealed in all their glory.
Having said that, IME the AT110E can perform better than you describe.
Three things I'd suggest trying before considering changing them out altogether would be to: 1) make sure they are firmly mounted into the headshells using proper stainless hex screws if you aren't already using them; 2) make sure that the cartridge bodies are siting square relative to the headshells when viewed from the front (azimuth); and 3) remove the flip down stylus guards.
The second bit is especially important with the AT110E as the open ended mounting lugs are barely wide enough to span the headshell mounting slots, and therefore allow twisting of the cartridge body if the torque applied to the two fixing screws isn't similar (and/or is excessive).
I'll also second the opinion to let them run in a good while longer before coming to any final conclusions.