Hey Dan-
I have an onboard airspeed indicator from EMS/Jomar too. I ordered it 2 years ago when they 1st got on their website...a year and a half later they got it to me. Development and production problems I guess. Right now I have it in a 20 year old Eagle with a 25 FP. I got 63 in a dive!
I got it for my Diamond Dust, but have decided to build a new one and build the indicator into it. The original Dust got a little worn out after being flown hard for 2 years. It was radared with a REALLY old radar gun (had vaccuum tubes!) and got 143 MPH on a bad pass. I'll keep you all updated as I build my new one with the indicator. (Probably won't be until later this winter however!)
Carl