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

Apply missing thermal grease to TRIAC