About this 3D model

Mircoscope mount for my simple usb microscope. The original mount from the microscope was not accurate to justify, so i decide to use a worm for adjusting. I was inspired from this microscope hack: http://www.hackerspace-ffm.de/wiki/index.php?title=DIY_Mikroskop 10x and 60x magnify works great from the microscope. the 200x magnifiy is a little bit unstable. i think there have to be a stepper motor version.