Here is our normal process:

1. I send a quotation
2. We do the first skype/teamviewer session, covering the interface, tramming the bed, setting the Z height, and printing in plasticine, including diagnosing under/over flow and some gcode editing.
3. I send a sales order (if you still wish to proceed)
4. We invoice for 10%
5. We build the printer; also, we do the second skype/teamviewer session, covering making a simple CAD model, exporting the .stl, healing the .stl, slicing it, and printing in ABS.
6. We invoice for the balance plus shipping, and we ship.

I'll be happy to book you for the first session, but we print in plasticine at 600 microns during that session. We can print at 25 microns in session two if you like.