greeting's boojum,I concur with you 100%,personal experience along with a little common sense are the definitive method's of learning.I happen to own quite a few book's from both of these renowned author's,(Rosenthal,Cervantes)and they advocate completely different method's,I tilt toward's Rosenthal's observation's,but i've gotten a good deal of info from the both of them,I guess that prove's that there are more than just two way's of doing thing's.

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"Let's get lost"....Chet Baker