I've been hunting for a year.....Why is it that all of the ones I've found so far are made by obviously not guitar people as the string groove in ALL of the rollers are the same size. Which means they're too small for the larger strings, like the lower three usually. The first problem child I bought the grooves were .022 to .025 wide. It's near impossible to modify and make them wider. Does anyone make a rollerized bridge with correct string groove widths? I'm installing a Vibrola and since no one seems to know about the original Gibson tapered nuts that went under the Tune-o-matics, and no one makes them either, I figured a rollerized bridge would be the easiest way out. This mess is keeping me from getting my project done. Thanks!