Whoa, i'm sure glad i asked and i'm more glad ya'll generously responded thanks alot, very helpful.

i'm also looking at used equipment that's why i asked these questions. i did know about the flight packs, and i did download the diagram when i first got started in this hobby(just recently) thanks rcken, i figured it would come in handy some day.

that cirrus looks like a pretty good deal!

thanks again!!!!!!!!