Some links how to make your cheap reflow oven better, my todo list…
Flash better firmware
https://github.com/UnifiedEngineering/T-962-improvements/wiki
Add DS18B20
http://hackaday.com/2014/11/27/Improving-the-t-962-reflow-oven/
https://github.com/UnifiedEngineering/T-962-improvements/wiki
Replace tape to prevent smell:
http://www.instructables.com/id/T962A-SMD-Reflow-Oven-FixHack/?ALLSTEPS
PWM Mod:
Not recommended for smaller T962!
https://github.com/UnifiedEngineering/T-962-improvements/wiki/System-fan-control