I did measure it, its 12 radius with no shims.
Ive played this guitar for long time and i love the playability, the acrion is set at 1.5mm bass and treble sides
Question is would it make any difference if i shim it to be flatter, can i go lower string action? Ive never done it before, im going to start build my own guitars soon and just found out that the bridge radius should be more like 18-19. All guitars ive searched with floyd rose and 12-16 compound radius thats sold seems to be 12" radius, jackson soloist bridge is 12"... i guess its fine.