Thats with the CH
I was wondering about getting out an iron and making the whole thing.
I see CH has kits and that other link describes making one but as far as I can tell the NON CH must be a mechanical advance if any.

Im in the process of doing a 46 like yourself and wondering how to start anything larger without spending the extra on an ignition system as I might as well get a ZDZ or such like if the costs escalate.
I take it on your larger projects you are adding an ignition mod ???