I see. I missed the timer bit the first go round. Whoops!I have one of these that I used to build a mama plate using @aart description. Worked great for that application as we were back and forth to tuck the chicks in every evening.
For the egg warmer I want to turn it on around 5am until ~10am using a timer so the AutoOff defeats that unless I get up real early. The seedling mat does seem like a good bet for this application. I have assembled a substitute using pipe heat wire, since I have already spent the money I will see if it works.
Thanks!
I'll be interested to see what you come up with. Likely something nifty, considering what you've done thus far.