I will have to disagree a little, yes I agree some sections are just worthless, but I have found a lot of info there and no where else pertaining specifically to the M3. Also the M3 sig is a good source of info, with the ability to ask ?????'s! I would say all listed resources and the sig is about the only combination that will truely help! I.E. There really is not one good source for most of the answers...it takes a hand full :-)