We replaced the rope with slugs which are used in [bigger] monohulls for guidance of the battens in the mailsail. The slugs are then tied to the tramp with a rope [4 mm- dyna stuff]

works perfect maily due to the fact that the slugs have a very small "loop" so they do not stick out very far from the "C"tube in the hull [approx. 10 mm/~0,4 inch]

cost approx - $15,- the slugs are available in variuos loop sizes and "base" diamater [the part that goes in the "c" tube in the hull] and material - we found out that the cheapest plastic ones work the best