Yup, that M107 must be it. It's the only difference between the two codes. Even if I put it at the very end of the start code it changes everything. No bed heating, slow homing...

So, a little clarification, at the risk of making myself look stupid. The info I had about the M190, M104, M109 codes was coming from the RepRap wiki g-code page. My memory told me it was 3D printer g-code in general. I guess there are still inconsistencies between the 3D printer manufacturers. In fact, the M107 fan off command is deprecated in RepRap; maybe that's the problem. I believe the FlashForge control is based on RepRap.

For now I am going to have to translate all my files through Replicatorg to clean out the M107, unless there is another way to get it out of there.

Unless, of course, I am still doing something wrong...

Still, nice piece of software! I've tried a few so far and this is my favorite.

@unlimitedbacon Thanks!!

Sounds like a good idea. Went back to a PC setup temporarily. Had to get something done. Back to the Mac tomorrow and trying the Linux version after that. Anything to be on the lookout for?

I really like the software and hope it performs as well as it looks in all guises.

As an aside, and generally speaking, are there any settings in firmware that you know of, that may cause a printer to not work on one system over another?

@john-w-hadlock have you had any luck figuring out what was giving you first layer issues? I'm having the same issue now. The first layer Extrusion Width is set to 200% but it still prints extremely thin. I should note, I don't have this issue with the first layer of a raft but once the raft is printed, the first layer of my object prints very thin. I don't know what else to do, I could use help.

I know it's a bit late, but maybe it's never too late to thank you all for the settings you've shared (very informative, especially on the retractation setting).
So ... thank you again !
Right now I'm using :

Extruder Temperature = 235 CBed Temperature = 45 C (buildtak)Slow Down If Layer Print Time Is Below = 20 secondsMaximum Fan Speed = 100%Minimum Fan Speed = 50% Retraction: 0.5mm @ 50mm/s

@tellingmachine The settings for previous prints aren't accessible in MatterControl, but the .gcode files which were created to run the prints are stored in the MatterControl data folder in .../MatterControl/data/gcode. At the bottom of each .gcode file are all the slice settings used. Just line up the time and date in the History tab with the time and date on the files to find the one you want.

Here are the locations of the data folder for various operating systems:

Windows: C:\Users\%Username%\AppData\Local\MatterControl (AppData may be hidden)

Mac OS X and Linux: ~/.local/share/ (.local may be hidden)