Making an extra hole in the wing spar

[Charles in SC]

I remember seeing some threads about this in the past but now when I search for it I cannot find them. I am wondering about making another hole for wires to go through. I cannot remember if you can make some or not and if so where and how big.
Thanks !

 

[Vonsmallhousen]

Matt has done it

Type in Spar Hole in his search and its all there

www.rv7blog.com.