This is an old and well covered topic on this forum. Could we please park it here. These discussions tend to end in flame wars with no real winners.
For my part, I try to share my limited knowledge and from time to time I sum it up in a schematic for other forumites to use freely for non commecial purposes. Sometimes I get a PM with tips from members, who want the info to remain private and I repect that and never share that particular info.
My entry into the Dumble tone world, was a ceriatone OTS kit, which turned out to be a great dissapointment.