heater control for curing oven

Good info, thanks.

This post brings up a couple of questions...

1. Do I need breather with a bladder (to allow the air to be forced
out)?
2. Is there any concern with vapors building up in the oven and
causing a fire?
3. Perhaps it would be a good idea to put 2 bars in the bladder and
then put the whole thing in a vacuum bag so that the mold only sees
approximately 1 bar? This would keep the fumes out of the oven too.
4. Can thermocouples be joined together to "average" without using
software?
5. What is a very affordable PID controller (preferably under $100)
that will allow the ramp rate (up and down) to be set?

Thanks again folks.

Joe