Hello, I am new to the site, and had a couple of questions about a guitar that I just picked up recently. According to the serial number it is a 1964 SG Junior. It appears that at some point in it's existence someone decided to take the finish off, and put some type of clear finish on it. Vintage Grover tuning machines were installed along with different volume, and tone pots. I would like to remove the Grovers, and go back to original Kluson style tuners. My fear is that the holes may have been enlarged to accommodate the Grovers, but I can't be sure. What is my best approach here? Should I use Kluson's, Gotoh's, Open Back, etc? Going back to finish for my second question...It appears that this guitar's original finish was Polaris White. Inside the control cavity is what appears to be the typical yellowed Polaris white paint, and the the top edge of the fretboard has black fret markers. Some years ago I had a '61 SG(Les Paul) Jr, and do not recall the fret markers being black. Were black fret markers only on the white models? Thanks for any help that can be provided! Also I will provide pics of the guitar soon.