Hi everyone great site lots of info! So here it goes.... I have an old lasts lite heater with electronic ignition and natural gas house has natural gas. The heat exchanger and most things are rotted out. I got a old but ten years newer in way better condition laars lite 2 for real cheap it's basically the same heater except this new one is propane and has push button ignition and a pilot. I can swap everything like the block and the U shaped pipe with orifices for the burn tray part no problem but my question is what to swap or use for the ignition since the old one was electronic and the newer one has the push button and pilot? There's no pilot setting on the gas valve that I have to use so I would have to swap the electronics and the heating element and just remove the button and pilot light? Sorry if that's hard to follow just trying to make this work! Any questions or help is appreciated!