Somebody was asking about stacking just 4 gauges
 

Sombody was running a tuner they liked and was asking about stacking a second tuner so they could use it just for gauges.

If you have an android OS phone, there is an app called garmin mechanic that can be run (needs an adapter) to show on board gauges.

It's original base is to be a basic trip computer but can be expanded to be a gauge system, might be worth you time to look into it.

I didn't look much further than what i told ya here. Down side will be ZERO support if ya can't get it to work. It is only going to read what the computer is, so if ya have any foolers installed you will get false readings.

It has a ton of other capabilities for diagnostics, to include code clearing.

From what I saw, I was only able to find a connecor for the garmin nuvi devices...didn't appear to have anything available to hook up to an android device... Maybe someone else knows something?

There's one called "torque" also. Requires a obdII to bluetooth adaptor.

all the adapters i've been able to find are blue tooth, i don't think they even make a droid or droid capable phone that is not blue tooth capable.

I tried to run my Edge Comp and Edge Juice with Attitude at one point. The Comp was for fueling, and EJWA for gauges. I made a Y harness for the CAN under the hood to share information. It did NOT work. It did throw any codes, but the two boxes fought one another, and I had close to stock power.

You can use a Edge Insight as a set of gauges that gives you all the pids of the edge juice minus the power module