William in your post #18 you imply that I stated "and lack of knowledge" this I never did, I did as you state "posed that it could be my lack of use". This may be the result of an incorrect assumption as practice and knowledge are in my thought two different things, as an example I have the knowledge of how to read music and play an instrument, however you do not want me to play for you as it has been many years since I have practiced, but the knowledge is still there, just not the results I want.
Cheers: Allan