Here's a nicely made affordable bridge you may want to try with your whammy rigged guitar. You can mount it to the body with included studs and wheels or put it on a custom wooden floating bridge base. 10.4mm spacing string to string. Post holes are 73.5mm center to center. Overall length 84.5mm, width 14.5mm. I measured 10.4mm height of the bridge base. Body studs measure 3.74mm diameter, M4 .7 threads. An interesting feature of the threaded studs is that they can be turned from the top with a 2mm hex key. This is a very useful feature in installing them into a wooden body or bridge base.