Water leaks on 330 at the four forward base mounts for hardtop support

I agree with Fishtales on a valise type raft. You really don't want that kind of weight up there.
My initial thought was if he had a hardtop mounted raft, that could be why he had the leaks in the first place.
 
I wanted one up there and out of the way, unfortunately per GW the top isn't built to hold. Balsa coring and a thin piece of glass on both sides.
 
My express is an hour away - how did you access the nuts/washers for these screws? I don't recall access plates in the cabin headliner. Trying to think about how I'll approach this problem in a couple months.