I wondered if that's what you meant, helicopter-redeye, in which case you insult my intelligence... or at least the training received by IMC pilots. I do understand and use the methods of correcting for drift with an ADF, hence my comments about +15/-15 - I learned a lot from 'VOR, ADF and RMI', which is a great book. What I said was that even when that method showed me on track, the GPS (and the view out of the window, when I could see it, which was about 30% of the time) nevertheless showed that I was 5-10 degrees off track.
I totally agree with Dan about equipment, though. I used to fly a Cherokee 180 with the original ADF - receiver aerial was a wire running from the top of the fin to the cockpit - and it was unbelievably sensitive and accurate compared to the crap fitted in current aircraft. It was an ADF from the days when you really, really needed a good one. It had a rotary tuning dial - someone had fitted a slaved digital frequency readout as well, for ease of use - and I could get the OX from 30-40 miles away.
Tim