#1
Alright, so I'm going to be getting a guitar from Warmoth pretty soon (7-string explorer) and I'm going to be putting a Kahler trem in it.

My question is this - is the cavity for the 7 string Kahler the same as the 6 string version?

I've looked around online, and there doesn't seem to be any information about it.
#3
Okay, cool.

Any idea on how much bigger the cavity will have to be? Or would there be some site where I could find the info on the size?