I purchased an Emag valve and was looking to swap the classic valve in my current marker out. I would in affect be using the emag valve as an ReTro valve (i.e. no batteries). In order to make the emag valve compatible, would I only need to swap the classic mag on/off pin for the emag on/off? I have looked around and this seems to be the correct course of action but I was just making sure. Thank you.