I promised to post a pic of my homemade heater using a Flea Bay pid and heater. Total cost about $20 if ordering from a slow boat source. The aluminum plate I scrounged up and drilled to accommodate the temp probe and the cartridge heater. At first the plate was oversized but I cut it shorter, no need to waste heat. I used a 100w heater and a 10amp pid controller that goes up to 220f. I set the temp around 120f it seems to work well this time of year. Not sure why the pictures are turned or how to straighten them sorry about that.