Hi: I have been flying a Phantom 2 for a while. Fantastic machine. Very stable in all kind of conditions. When in GPS, would hold its position very well Then we bought an Inspire 1. Totally different behavior with wind guts: it drifts. May be downwind a little, or upwind. It even changes altitude (always in P-GPS). It´s seems to have a lack of reaction. Trying to move slowly is almost impossible to make a straight path (when in speed it´s very stable). Wich are the basic parameters to help with this? Is a software issue or a design one? Best regards!