CB trunk and waterline?

Hey daysailers,
About how far up from the base of the CB trunk does waterline extend to? I'm wanting to drill some holes in the trunk of my ospray and would like to know the safe distance from the base. Would it be about where the CB handle is mounted?
Thanks.
About how far up from the base of the CB trunk does waterline extend to? I'm wanting to drill some holes in the trunk of my ospray and would like to know the safe distance from the base. Would it be about where the CB handle is mounted?
Thanks.