I have been testing the use of Pi zero W using a USB wifi adaptor and the CSI camera.
As it has been reported that this should solve the problem of excessive CPU usage by disabling the onboard wfi+bluetooth.
Pi zero W
Pi camera connected via CSI
USB wifi adaptor RTL8191SU chipset
With an active browser session, the webcam streaming, and a print from raspi SD card at 60mm/s I didn't see CPU usage above ~60% and usually sitting around 50%.
What are the concerns that I should be aware of that I would notice if the Pi zero was causing problems.
From what I have read people were seeing 80%+ CPU usage and freezing of the printer during a print resulting in poor prints or failed completely.