I am new to this site and have forgotten so much of what I have seen in the forums. I hope to be able to use the problems and solutions posted to help me to relearn the higher level math and physics I have forgotten. I will add that it is true that when you don't use it you lose it. Having gone as far as Graduate level quantum physics and not using more than what I needed to work as an electronics tech I have a lot to relearn and am soo glad that I found you all. Sadly I should have looked years ago as I graduated in 1995 with a comprehensive degree in Physics and Electronics.