Seems like a good place for the traveler, but for the mainsheet.

I it seems to me like it would spend an awful lot of time right in the middle of things, or forced to be bent arond the sides of the cabin top.

Let me go out and sail the boat, (it is 72f, blowing about 12) I will tie a line around the boom and hang it down to try to picture it and get back to you.