Swash drive gen 7 - 3 a bars for what ? and where to lube?

[spoonertattoos]

hey folks.
Just picked up a gen 7 used on ebay . Came today and wow its awesome. I want another. But question. It came with 3 amature bars (do you call em that for rotaries?). Im assuming 1 is for lining? Another for soft shading and another for color packing but how do you tell which is which. And what is your experience with them? Do you often change them up? Seems like a lot of extra work.
This is what I did today with it. (part of a sleeve - see it bigger and the whole piece here - http://jspooner.files.wordpress.com/...picture-71.png) I couldnt tell you, what clip I had in it but I loved the machine regardless.

Picture 28.jpg


Second question. Where are you supposed to oil this thing?