Can they log the basic sensors you already have? Meaning non-racepak sensors, just your run of the mill temp and oil pressure type one, or do they all have to use THEIR sensors?

I think I need a logger, but man they are pricey...And then to display what they are reading you need another set of sensors and gauges...I want to look at putting one in, but need it at a more reasonable price tag when all is said and done.