I am interested in building a gantry for a diy cnc plasma cutter. I would like to use micro switches to detect torch height like the plasmacam 98z (older model) I have two switches from an old machine but the model # is worn off and plasmacam is not helpful unless you own a machine. Does anyone have a 98z that can tell me the model # of the switches that home the machine and control torch height? I think they might be Omron. Thanks.