Summary Please feel free to donate through Paypal to [email protected] and I will keep the designs coming Allows you to install an MK8 extruder in place of the UP Mini extruder. This is for UP Mini printers with the Ramps/Arduino modification or any main board replacement that allows you to set the X-axis travel. The main difference between this model and the other MK8 model I have posted is that this model has no provisions for the UP Mini pcb which is not needed after the mod to a Ramps/Arduino board.