Hey David,
I ran across this article recently. It relates to CRPS treatment but I found the SIBO link to nerve pain and inflammation interesting. The patient also took low dose naltrexone which improves CRPS on its own. However, it is a fascinating premise and may relate somewhat to what you are undertaking.
http://rsds.org/wp-content/uploads/2...N-and-CRPS.pdf
Good luck!