John221us
En-Route
John, I think what many are trying to diplomatically tell you there is no cheap way to do it correctly. IMO the KNS 80 is not worth the installation cost if it was given to you. It was nice stuff in the early 80's. Its time has passed. But, since you are not going to do any serious IMC anyway in a 140 I think what ever is the cheapest to get your plane where you can do your training might be your best bet. All of us are good at spending another's money. For $45K I even have some suggestions Good luck!
Yes, to do what I would want to do, I would put in a new t configuration panel and a 430 and get rid of the MX-11 and NAV 11. That would run about $16K. I don't really have $16K to drop on a panel right now and it really doesn't make sense, because I will get little to none of it back, when I go to sell the plane (I have other reasons for wanting to trade up). I was looking at whatever I spend as an investment in my instrument training and not an investment in the plane. If the "door stop" gets me the tools I need, then it might be worth it.