Step 7: Measure and Mark Mortise

Picture of Measure and Mark Mortise
Take the freshly cut part of the handle and mark the appropriate mortise to accept your portafilter head.  I have a Gaggia Classic espresso machine and it's portafilter has a strange square shaft that mates it to the handle.  We marked it's height and width directly on the handle so we'd know where to create the mortise on the drill press in the next step.