Here's a fingering for F7#11 that's not too bad...
--8------------ C = 5th
--10----------- A = 3rd
--8------------ Eb = b7th
--9------------ B = #11
--8------------ F = root/1st
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or with the 9th....
--8------------ C = 5th
--8------------ G = 9th
--8------------ Eb = b7th
--9------------ B = #11
--8------------ F = root/1st
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