I've had bags on 2 trucks. I separated the lines on the 97, at first, but then I teed them together to make airing simpler, plus I went to in-cab control. I couldn't tell any difference having the bags teed together cuz my loads are always centered. My first in-cab air was a $15 Costco compressor and I put it under the drivers seat. I ran the bag line into the cab and used hardware store fitting to tee in a gauge and connect to the compressor. I pulled the cord from under the seat and plugged it into the cig lighter to air up and I had a Schrader to let out the air. It was CHEAP and it worked great! I moved that setup to my 03 I didn't build a nice, full system with a Viair compressor and tank til I put a PRXB on the truck. In-cab air is the only way, IMO, so you can adjust for bad roads while driving. Craig