Andrew. I totally agree about cutting up one's panel. The Zeus 2.8 fits in a 80mm cutout. I replaced my GPS-NAV/LX-NAV/57mm Cambridge vario with the smaller Zeus and associated vario, with one 57mm left over to accomodate a transponder. I was concerned that the small display would be too small, but really it is no different than the LX7007/5000/4000 which I previously flew with since the mid 90s
(except that my eyes are quite a bit older now).