Thank you, Dan, for taking the time to offer this informational link. I perused the site and, while I found a neat 'Glow-to-Gas' electronic ignition conversion for a Saito 1.8 cu. in. glow engines that is of interest, I found no information relating specifically to the questions I posed around Hall Effect Sensor electronic components...how to identify the correct ones for an R/C electronic ignition system application and where to source them. Hopefully, more will view the post and respond in kind...T. Allen