i am finding that there are tons of forums on motor oil, car waxes, and etc. they all have the same obsession with using the most "value add" products. e.g. car wax under 10 that lasts a year or syn oil under 20 for 5qt that can go 12k miles. these are the similar things i see in the tennis forums about strings. value, feel, how long they last etc. it's just amazing how people have obsessions that keep people interested. very healthy and good hobbies.