Heater Knob

Summary This is for a heater I picked up from a thrift store. It was missing the control knob. Makerbot to the rescue. After a couple revisions I settled on what you see here. Instructions I've been printing from the SD card other wise I get a build up of excess plastic around the center hole. If some one can print this and have the pointer and side wall be nice and clean let me know how you did it.