EDIT: Extruder temperature stability improved using PID control. Also I slowed down the encoder knob in the menus
This is an unofficial firmware for BQs Prusa i3 Hephestos.
I got tired of having to go through 8 sub-menus to change filament or move steppers, so I ported the official Marlin firmware to Repetier.
Repetiers biggest advantage are its menus and settings. You can change temperature, fan speed and flow during prints.
Also the movements should be smoother than with Marlin but I have to do some more testing to confirm this.
Installation: Open Repetier.ino and upload using ArduinoIDE
You can use the Configuration.h to modify the firmware on this website:
DISCLAIMER: Use at your own risk! I am not reponsible for any damage to your printer.