After ever increasing temperature instability with my $7 Goodwill toaster oven I started looking at options. Replace the oven and hope for better results, maybe build a PID for the oven, whatever. Then it crossed my mind to look at something bigger. I found a 24" wall oven with digital readout and a built in timer on Facebook marketplace. I have enough room for it in my shop and could easily pull 220 from the panel. I even had a length of 10/3 cable. I bought it for $50 and took it home to try it out.
I set the bake temp at 400° and placed my oven thermometer on the middle shelf. When it beeped and the readout said 400° I opened the door and checked the thermometer. Right on the money. A real advantage of this over a toaster oven is capacity. I would put about 50 of the 240 grain boolits in the toaster oven and watch the thermometer drop and try to catch up. I put 100 of them in this oven and it never moved from the set point. That is a lot of cold lead. Having the built in timer is helpful too.