Hi Alan As per Ed McMorrow, Thin is about 0.5 mm and sharp is well... sharp :) No rounded edges... or just very very slightly buffed. 2.5 mm radius is just... well. I would never use that under any circumstances myself. My experience tells me that is a recipe for future string buzz noise. YMMV :) Cheers RicB Ric, Would you mind quantifying "thin" and "sharp" for me? Ted Sambell talked about a 2.5mm radius, which works out to 0.1" or between a sixteenth and an eighth inch radius (for metric-phobes). Thanks.
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