I'm not exactly a noob at this stuff, but Soliprint is absolutely terrible. I tried to use Rep, but since I'm on a Mac the press profile isn't present. Tried to add the G29 start code, but it still prints over the bed.

Using Repetier Host is your best bet. You need to configure more settings than simply adding G29 though, including removing whatever the slicer tries to do on startup.

I collected the settings, and other things I tried, in my blog post: http://paulsaulnier.com/2015/03/16/gett … dle-press/

Calibration cube is directly downloaded from Thingiverse and I just drag it into Soliprint. If I try to "load it" Soliprint crashes. Settings are all at default for all slicing. I took the original PLY and converted to STL again in Meshmixer after trying to print the original STL's... still no dice.

Calibration cube measurements are fine all around. Print is fine (well, for the Press)

Every time I've loaded them they appear with proper measurement. When I print, it probes the entire bed and then prints a tiny skirt before printing the in the center of the skirt and moving cm at a time. The result is a blob of plastic. If I scale the print to look larger, it does the same thing.

I'm not exactly a noob at this stuff, but Soliprint is absolutely terrible. I tried to use Rep, but since I'm on a Mac the press profile isn't present. Tried to add the G29 start code, but it still prints over the bed.

How big does the calibration cube look in your host software? Does it come out the right size?

How big do your other prints look in your host software? Are they looking the right size before you print them? What makes you think it's a scaling issue?

Just some troubleshooting questions that come to mind.