Another question - is there an easy way to re line the internal mast outhaul without pulling the end cap off? I can't see one but sometimes my thoughts aren't always outside the box, haha.
Mast outhaul? I assume you mean boom outhaul.
The outhaul line ties off with a stopper knot on the top of the boom (look inside the track and you will see a knot) runs to a small block inside the boom which is connected to the outhaul cable, and then runs back forward through the opening in the bottom of the boom and out to the cleat. You would have to try to use the old line as a snake with the new line taped or tied on with twine to pull it through. I think that would be a lot more difficult than just pulling off the end cap, replacing the line, and then re-riveting the cap back on.