Great references, thanks. I agree with your assessment - I don't
think 3ck can expect to benefit from one of these approaches anytime
soon. Too bad, as I would have liked the improved minimums..

I fly a Cessna 172. My ADF is not operating and my avionics shop suggested
removing and installing a Garmin 430.
Now I see that the 480 is available.
What do you guys think? 430 or 480?
Hank