ORIGINAL: PlaneKrazee
Does the CH 1/4" plug cap twist and lock like a McDaniel glow driver? This is the design I'd like to see. I've seen an old 1/4" CH ignition on a ST4500 and the guy always had a hard time with keeping the caps on. They may have been abused.
The plug caps are not hard to make. I made one from a McDaniel part and it works fine. I don't know how it will hold up in the long run. I hope to make another in the next couple weeks and take some photos of the process.