I am in the process of building a new tramp for my Nacra 5.2. It is a one piece with bolt ropes on the front and sides. I like my tramps drum tight too, so if it sags, I am going to put two rows of grommets up the middle and pull it tight as if it were a two piece. I have measured and remeasured and I am pretty sure it is going to be pretty darn tight. I have attached a picture of what I have so far. All that remains is sewing the back seam, grommets, and adding some pockets up front for the halyards.