Bought some used Tremonti S pickups, planning to cover them b/c zebras. (Enough with the zebras already!) Thought I measured well and bought covers in 50mm & 52mm. Sadly, 50 fit perfectly...on both. Now I gotta wait for another one from Philadelphia Luthier. On a related note, if any forum peeps need a smoked black nickel cover @52mm, shoot me a PM.