Bi-polar proportional thermoelectric incubator

I finally finished this idea I envisioned two years ago. It took me six months to gather the electronic components. I got the wine cooler a year ago, that's why all the scratches on it, but the inside is like new. It maintains a set temp by heating or cooling proportionally! No more worrying about the temp rising in summer... Its stability and accuracy is unbelievable, up to 2/10nths of a degree when the probe is strategically placed near the heat flow, or up to 4/10nths of a degree if the probe is placed elsewhere within the incubator. It stabilizes the set temp as soon as it reaches it and maintains it remarkably accurate. It eliminates those hours or day long temp calibration. I could practically set it and forget it. Update: I’ve added a bi-color LED to indicate when its heating or cooling.
I later found out that there's one like it in the market, but it's slightly smaller and it goes for almost 700 bukaroos!