This object was made from a CT scan- you can find it here: thingiverse.com/thing:203856
After a lot of experimentation I have figured out most of the settings for my printer (MegaMax) and its firmware (Marlin) and the slicer (Slic3r) to get high quality prints. This particular print has been running for about 10 hours. There are a few blebs in the surface but I think they'll come off easily once the print is complete.
Retraction is a little problematic- in this print the support material generates a lot of retracts which the SnakeBiter does OK, but they are a relatively slow process due to the amount of rotation required and while that is happening the nozzle is sitting on the part, heating previously laid down plastic. This creates blobs on the nozzle which occasionally get carried over to and deposited on the model. i'll have to see if there is a way to speed up retracts or set up a wire brush for the nozzle to wipe itself on occasionally.
I have run about 800g of filament through the extruder so far and have yet to experience any jamming or odd behavior. I have been using Coex3d 3mm ABS.