Yes, you do have to do some thinking about your line layout, for sure. I don't think I'd want to go with a Maroske that could hold two lines in the same hole/tube. The hole would have to be too big and, I think, would look out of place. I just went with two fittings side by side in a double configuration. It worked well and I think it looks OK.

http://justyakkin2.blogspot.ca/2013/01/point-bennett-project-devil-in-details.html

The beauty(ies) of the Maroske is that they do not protrude above the deck, so there's no chance of them hooking into you or your equipment during rescues and such. This is especially true for back deck scrambles when you are trying to slide up the back up the boat with your legs straddling each side. They are also INCREDIBLY strong. The only way they can break is to to pull the line right through the deck. Very hard to do because you have to pull the fiberglass tube through the deck as well.

Cheers,

Sean