1. any local shop selling gotoh 510 tuner? or else buy from which online store?
2. which shop provide tuner changing service (need to drill hole for my acoustic guitar)?
TY Music Center brings in quite a few Gotoh products including tuning heads, tremolos and other spare parts. I know they have the 510 series tremolos but I'm not too sure about the tuning heads, try giving them a call first. http://tymusiccenter.com/