I've known that the specs for trem blocks varied by string spacing, plate mounting screws and Trem Arm placement all labeled "Made in America", "Asian" or "Made in Mexico". And whether or not you need a Shorty Block. Recently I ran into a problem. I have an Asian made guitar(SX) and I ordered a trem block for it. I ordered the "Asian" spec block, but the original was the "Made in Mexico" block. The difference between the 2 is the plate mounting screws and trem arm placement. The string spacing is the same(10.5mm) I also have a Indonesian made S type guitar(Johnson by AXL) and I decided to look it over. It was also "Made in Mexico" spec. I just wonder now about how many Asian made guitars have the Made in Mexico spec trem blocks. It's hard enough to try and order a trem block going through 3 different spec blocks and if you need the shorty block, now they have to go and mix them around too. From now on I'll make sure to completely disassemble the trem unit and check every measurement before ordering because you can't assume that an Asian made guitar will have the Asian specs.