I read the bulletin - spindle turning on at 10K RPM - not a good thing! Raspberry Pi might be a good way to go for PCNC 440 owners (I have PCNC 1100). I may try the Raspberry Pi method anyway, even though it sounds like installing Dropbox on my PP computer should work just fine. Another advantage to the Raspberry Pi for me is WiFi access. My PP computer is in the Tormach cabinet and doesn't get a good WiFi connection surrounded by so much metal. I could locate the RPi in outside the base on the back of the machine where the WiFi signal is pretty good; then just run an Ethernet cable from RPi to the PP computer.