Back when PID's for the common man was first discussed, I bemoaned the fact that there was no one out there building controllers for the hobby market. In the years since, there have been several PID sellers, but for whatever reason I didn't buy. This, as it turns out was a big mistake. I would have been much better off buying PID's instead of moulds, or guns for that matter.
I bought a PID from kyle623. Received it the middle of last week, and used it over the weekend. I am absolutely astounded at the difference a controller makes. I have never made so many bright, shiny, slightly frosted (710°F) with perfect fillout in one session since I started casting! It would typically overshoot 15°F from a cold start and then settle into a +/-5°F temp swing. I'm told this will get better, but I don't care as it's perfect as is, without any improvements.
With the rapid increase in productivity brought about by my new controller, I foresee the need for a commensurate technological breakthrough in my lubesizing techniques. Thank you Kyle!