More: Audiovox Projects ...
This bass is a 21" scale, with a piezo saddle mounted in an adjustable bridge. The soundhole is just for looks. The strings are metal-wound Kalas. The fretboard is cut out of the ugliest piece of wood I ever received. For such a small neck, I managed to cut around most of the ugly, and the result isn't half bad.
More: Audiovox Uke Bass ...
Here I am getting ready to cut fret slots. I have marked the fret locations along the centerline, just to confirm that everything is right. Below that is my fret slotting guide. It is a 1" piece of aluminum, precisely drilled with a series of holes based on the standard mathematical formula for fret locations, which you can look up, or use one of the online calculators. I made a spreadsheet of it. The holes are numbered along the top, with the corresponding scale length below. The interesting ones are: (rounded-off)
More: Installing Frets ...