About this 3D model

UPDATED v2 The standard nobs are really hard to move, and very imprecise. So i needed a funky, precise nob to relevel my print bed with less effort and without going through the complete leveling routine. I found this thing http://www.thingiverse.com/thing:77817 but wasn't satisfied with the overall design. To small, to unstable, not 100% grippy and hard to read. Here's the redesign, realised with openScad(the nob itself) and 123d Design(Indicator). I also attached my x3g(V1 !!!) for easy oob printing. I recommend the v2 version and the settings metioned bellow. First version comes with a static, printed-in indicator. The v2 has got a movable indicator, so you can define your own and unique point zero for all 3 nobs(recommend to set zero at 6 o'clock for best readability and range - a switch between 3-9 should be the range from 0.05-0.15mm, if 0.10 is at 6)