Version 2:
I kept forgetting that I changed my nozzle to 0.8 or 0.6 and would send print from my SD card. The print would proceed even though I've told the printer the new nozzle size installed. That check only seems to work when printing direct from Maker World. "You have installed the 0.6 nozzle but this profile requires 0.4" something like that. So, I created these Nozzle Signs The clip into the printer on the inside frame really easily. Great clearances all around. Easily seen by the on board camera. Especially if placed forward enough.
15 - 20 minutes depending on if you do start up print stuff and only 4g of filament for all 4.