I found the nickle [sic] file on thingiverse.
http://www.thingiverse.com/thing:84795
On mine, I found I like to leave the diameter at 2.95 which is what I measured, and change the flow %. I had pretty good luck with 95 or 96%.
Like Sebastian says, right click and move to rotate. You can also shift right click and it will pan your part.
I guess I should have mentioned, I have a mini like bladerunner. I can’t figure out how to follow Triffid’s tuning guide with a mini.
I could save my gcode to an SD card but my mini wouldn’t know what to do with it. I have Slic3r and Repetier Host, but I haven’t been able to get them to work. Maybe Repetier isn’t set up right? Or slic3r? If someone with a mini could post a step-by-step, I’d be very grateful.