Re: Electronic artificial horizons
Keef, I didn't know you were interested - if you want to borrow my PDA-linked PCEFIS you are welcome to try it. System originally cost about £1300 for the EFIS box and leads, say £300 for PDA if one didn't already have one, and £2-300 for a Garmin 89 or 90 for the GPS driver (it might work with others too, else could need a different lead for the GPS bit if you want to display that at the same time as attitude data).
Regards - Chris.