Repetier_Host startup GCode

This is purely an information text of how i use the PID settings in startup GCode to maintain a constant Temp in my Machine. An explanation is included.
The belt loop is included to actually post this. If I not supposed to do this please delete.
Update 05/06/2017
I have included a file I use in Excel format for Filament Calculations and Stepper motor Calculations to get the Actual height for each layer. I then use this in the slicer program