Hey guys i want some oppinions, you know what im asking, you read the title.

A few days ago my savannah monitor finally layed eggs. I was expecting 25-30 eggs. Noooope, 42, only one iffy one too. So you can see the delema. I have my eggs in a s.i.m tub inside the incubator im using (a zoo med reptibator) but its too small for all the eggs. So soon, Im gonna be building a diy incubator (either out of an old fridge or a cooler using heat tape)

2 questions. First, how do i hook up the flexwatt heat tape to a thermometer? And second, what would be a good reliable thermostat that is also fairly affordable (nothing over 70$ if possible.)