@ColRay
OK Col, so your 3D printer is a ripper unit and, in all honesty, if your happy with your current setup, then can I suggest honing-in on the file conversion process and try and totally 'localise' that aspect.
The objective being the removal of 'the Cloud' bottleneck.
Please bear with me while ask a few folk I know about free software for this.
But, it would be handy to know what computer, including the model number, and which Operating System (Windows, MacOS, Linux) you use and/or prefer.
Cheers
Murray.
"An evil man will burn his own nation to the ground to rule over the ashes". SunTzu. - Cheers.