so ,ive had these new
gotoh cosmos black tuners
sxb510,s on my guitar for 10 days. quite possibly the smoothest tuners ive had on any guitar. The 2 screw mounting holes matched up perfectly with original holes. The only mod needed was to enlarge the bushing hole on front of headstock. Original bushings are 8.5 mm. The new bushings are 8.7 mm.I accomplished the enlargement by using a half round medium cut diamond file. Just to ensure ,not to chip ,finish on headstock. Worked perfectly .Also note ,that these new bushings are 2mm longer than original. So there is more of the tuning post actually inside the bushing. Great tuners.