While it is important to find the right adjustment(s) to make in order to get your Polaris operating well, I thought I'd mention something I've noticed about our Polaris 380. The method and efficiency of operation seem to be directly correlated to the water temperature. Simply put, ours roams entirely differently when the water temp is 55 degrees than it does when the water temp is 85 degrees. I have always assumed that it has something to do with a change in the density??? of the water at various temperatures. At lower temps, it runs in a more compact and straight line pattern and remains for the most part on the floor of the pool. With warmer temps, it is much more random, covers every square inch and readily climbs the sides of the pool. Just thought I would mention this. For some people it might not hurt to wait to adjust the Polaris until the water comes up to average summertime temps. In my experience, it's just not going to act in April or May like it does in July or August. I'll let the science pros on the board explain to us why.