Handyman side hustle......hang a used hollow core door in a remodel rough opening. After squaring up the bottom of the door and ripping it to the final width there was no remaining frame on the hinge side or the bottom and the door was now 3/4" too short. Milled a new core frame out of 2 x 4 and re-skinned the bottom extension with fiberboard. The extension will not show after final painting. Turned out great.
