Hello; need a little help.I recently purchased a Paragon kiln #E9C for heat treating.Specs(115v,12amps,1375watts & max temp 2000 degrees) Would like to install diy PID controller,but have no idea about choosing the right PID for the job.asked paragon but they make one cost is $515.00 way more than I wanted to spend DIY is much cheaper for me!! Icould use some advice!!