Nic,
You have spiked my interest in 3D printing, I always knew it was cool but never thought a prosumer could get the skills to do it well. A few questions if you don't mind :-
1) What model printer do you use and what does it cost?
2) Are the consumables expensive as per most printers?
3) Do you have to become a CAD expert to really use it?
4) Did you do a CAD course?
Sorry for so many questions but in my mind I am already planning a parts printing list
Cheers
David