CJboy
Did you actually use the ADF? I would tune the thing if it was part of the procedure and keep it in the scan but to be quite honest I have not had to make any practical use of the information that the ADF had to offer for a long time.
I find it very hard to think of a situation it which an ADF would tell you that the FMS had gone wrong before the FMS had done so already, ADF is dark ages technology with so many potential errors that if someone tried to introduce it now as a new navigation system they would lock them up in the funny farm!
To be quite honest I think that you would do well to examine he way you are flying the aircraft to see if some of your practices are not a hang over from the way the IR is taught in the UK and you are not using the out dated practices that are the stock in trade of those who love to turn everything into a black art just to make themselves look clever.