Ender 3 Changes

- For XYZ cube issues
	- For XYZ cube change concentric infill pattern for top layer to zig zag to fix Z layer issue
	- Fix for "Ringing" issue - due to weight of glass bed change the "Jerk" setting from default 20 to 10 or 5
	- Fix for "Ringing" issue - also check acceleration - may help to reduce to 250-300
	- Fix for "Ringing" issue - check to see if changing "Wall Line Count (Perimeters)" to 3 - 4
	- Check eccentric nuts on Y-axis to ensure it's tight

- Bed adhesion
	- Add a "G4 P<milliseconds>" gcode after an M190 command to heat bed then wait for a couple minutes:
		- M190 S60 ; heat bed to 60 and wait for temp
		- G4 P120000 ; wait for 2 minutes (to make sure the top of glass is heated)
	- The G4 wait can be added at the top of the Cura start gcode and it should heat B/E first then perform G4 wait

- Part cooling fan
	- Ensure that Cura is set to run the fan at 100% after the initial layer - initial layer needs to go down with no fan to adhere better