a very good article, wildwilly he is not saying we need to check all that, but some of the important ones are stiffness, weight and length, day to day these wont change much

i know right now i am playing way too light clubs and can hardly feel it, i am stronger than the average 18 year old, length is another important one, i wouldnt mind a half inch cut off of mine, and my shaft is too weak for my aggressive swing