Hi, I'm thinking of upgrading my bass. I'd like to replace Gotoh 201 with Hipshot A style bridge. At first, I didn't know the presence of FM1 so I was trying to buy a original A style with 4 screw holes. And asked local luthier for installation since I have terrible hand skill. But I found a Hipshot A style FM1. I don't know what is different between original A style and FM1 except screw holes. But I kind of like it. It spare some money for luthier and I don't have to make my bass holely. I'm just concern that will Hipshot A style FM1 fit perfectly with 5 screw hole for Gotoh 201? Does this require extra screwing or those crafting things? I am really really terrible at crafting.... I don't want to ruin my beloved bass. So give me advice. Help me. Thank you all and have a nice day.