Appreciate your taking the time to respond on the Forums, Deniz! I just retested everything and it's still drifting. I'm not talking about a lot of drift, but I can watch the camera slowly panning. I even re-calibrated the compasses on the Movi Pro and Mimic. Set Declination to 12 degrees (according to your link, zip code 90035). It drifts in every Heading Assist mode: None, Fixed (on Movi Pro), Compass. I've tried all the combinations I can think of between Mimic and Movi Pro and it is always panning just a little bit. Not a ton, but way more than something that would take 10 minutes to notice... I can watch it drifting. My mimic is mounted onto a tripod head, so it's not moving. Shots are definitely operable with the slight Mimic drift -- that's not the problem. It's when you're using the Movi as a fixed remote head, and you frame the shot, and step away from the camera for a minute, and then it's pointing in completely the wrong direction because it's drifted off. Drives me and the Directors crazy!! On longer shots, I have to constantly be back-panning the Mimic to counteract the drifting. This is why I prefer to use my geared wheels, because they can be zeroed out and won't drift at all.