I need to replace the airspeed indicator in my plane. It doesn't need to be TSO'd, and being naturally thrifty (some would say cheap) I'm looking at two of the lower cost indicators that Aircraft Spruce sells, namely the Falcon and Skysports. The price is similar, the Skysports being a few dollars more. With a 90mph Vne, I don't need more than a 100 mph or 80 knot range. I've heard some complaints about the Falcon instruments, but the Falcon altimeter I installed last year is working perfectly. Then I just have to decide whether to get one calibrated in knots or mph. Thoughts?