Originally posted by noticingthemistake

Looking at your voicing, all cool but something I will bring to attention is the voicing for the mb13 chords sound like other chords. The first one (1x112x) sounds like a Fm7#5 chord or even Db9/F, or clearer in the second one (xx1121) Eb11. I know a 5th isn't a great combo but for a distinctive b13 sound, I think it needs to be there. Otherwise we can think of a b13 as a #5 without conclusion. [/B]

That's the "give and take" of the instrument, we only have 4 fingers to work with, and like stated, it rarely sounds good when you try to jam all the notes in there. So you have to ask yourself "do I play these notes because ther Supposed to be in the chord" or "do I leave out a few tones and play something that sounds more satisfying to the ear". You find, after awhile, that you will hardly miss those notes anyway, the overtone series will take of 5ths' and Roots.

For the record, I would play Fminb13 as such (xx6668)