Macro Photography and Bellows

I am considering getting a set of bellows (PB4) for taking those really close up macro shots.
What else am I going to need to connect it to my D70 i heare that there is an adapter ring I need to get to protect the af/electronics of the camera.
What would be a good lens to use?
Dose anyone else have this setup going?
What else am I going to need to connect it to my D70 i heare that there is an adapter ring I need to get to protect the af/electronics of the camera.
What would be a good lens to use?
Dose anyone else have this setup going?