There's a railroader's line called EZY-line, it's stretchy (they say 7x before it breaks). I played with some for rigging the uboat, but went thread. The idea is to CA one end, stretch taught, hold and CA. It's very cool stuff, comes in 2 diameters and white or black I think, takes paint OK. Expensive, but could be good for the future. NOT that you need to change your rigging, it's great!