Today is the day I drill the area beneath the mast step.. We shall see what I have to contend with. My plan is to measure the thickness of the roof along side the hatch with a large C-clamp and mark a 3/8th's drill to about 1/4" less that I measure. No junk or mess, no problem.

Valhalla has a track across the cabin for a 2 curtains that is installed at the bunk ends. My wife and daughter have been happy with that arrangement for a long time. Of course, It does help to have the curtains installed.