Thinking about tracking down a deal on a PF115HE to put under my RB115... and then I got curious about if I wanted to use a head with that cab. Does anyone have the dimensions for the two sets of pre-drilled holes in the portaflex cabinet lids? Curious about mounting an Aggie Tone Hammer or an Ampeg Venture head on that portaflex lid. Obviously, I could drill my own holes... just curious if anyone knows the dimensions for the inner & outer holes that are already drilled.