Another Mini-Drill Press

Yet another mini-drill press. There are some very nice ones on this site but I didn't see one I really liked and, since COVID-19 has me housebound, I designed my own. This one is from parts from a HP 637 printer with a 37mm 18VDC motor and power supply. It had a 3/8" smooth rod that I cut to size, and an 8mm rod with splines where rubber wheels fit about 80-84mm long. The motor bracket is designed to use inexpensive sleeve bearings like these:
https://www.mcmaster.com/1688K13-1688K13

The threaded rod I used was a 5/16" 8-8 Stainless Steel and 8" long, but any clean threaded rod 5/16", or even 8mm, should work. It should be about 1/2" longer than the smooth rod. I got mine from here:
https://www.mcmaster.com/95412A323-95412A323

The 8mm rod that attaches to the gear wheel to raise and lower the drill motor came from the printer and is close enough to 5/16" to not matter. I cut mine so that there are splines under the lever arm only. The printed gear wheel has wide spot in the gea