Hello Fabrizio, 

I can now build the 0.9 code and have that running on my Celestron CGEM DX and Astroberry. After two alignment stars, and a goto operation, the mount completely settles down and it tracks pretty well (about 15 seconds after the mount stops moving, the stars slowly drift, then the stars stop moving. The issue I see now is a mismatch between Kstars and the mount. The attachment shows what I have immediately after a goto to Arcturus. The mount positioned correctly, but somehow the Kstars location before goto and the Kstars location after goto don't agree!