I'm hoping someone with a high-top 22' C-Dory Cruiser can measure their ceiling for me. I want to know the dimensions of the highest part of the ceiling, the part that is essentially flat before it starts to slope downward at the ends and sides. My normal-top 22' ceiling measures 34" x 68" before it starts to slope downward. What is the comparable measurement for a high-top please? I'm guessing it is 34" x something substantially shorter than 68" in length? Thank you so much!