Gibson Acoustic Guitars: Questions: How To Fix Loose End Pin Jack In A Martin Acoustic Guitar.?

How to fix loose end pin jack in a Martin acoustic guitar.?

How can I tighten the loose nut inside that holds the jack tight. I can’t get my hand all the way in through the hole. Is there a special wrench? How much would it cost to have someone else do it?

Thanks

Acoustic Guitar senior editor Teja Gerken demonstrates the Martin GPCPA1. For the full review, please visit www.acousticguitar.com