The TT looks really well executed. 

As far as the magnetic field goes: 

In addition it would also be possible to use a thin sheet of 'Mu metal' on top of the platter to further isolate the cart from any EMI effects.

Details Here:

http://www.l-07d.com/tweaks.htm

Zanash:

I'm working on the name with the mods, until then It'll just have to be recognition by Avatar.