Turntable Repair

This nifty little programmable turntable that is part of a robotic arm kit was donated to my hackerspace - Berks CoLab http://berkscolab.org - and we've been using it for 360 degree 3D laser scanner experiments. However it has a few problems - the large gear is slightly stripped and the table design is a pain because there's a giant hole in the center that makes it hard to sit objects in the center.

I used the MCAD openscad library http://github.com/D1plo1d/MCAD to create a new gear that sor