A couple of weeks ago, Renenkel posted this thread showing how he made a precision control for his wax iron: http://www.epicski.com/t/113462/homemade-precision-wax-i
That got me thinking I should do something similar, but I don't have a box full of electronic controls I can use. Nevertheless, I took my mom's best iron apart and found that the control in it is just a simple bimetallic strip with a fulcrum on a fixed bracket, with a height adjustment. I bent the bracket to make the circuit disconnect quicker, and adjusted the height so that the cam control is usable only in lower heat ranges. It works way better, and it only took about 10 minutes.