I could care less about the heat shrink covering the wire parts - that's okay by me - if Nemo )Neo?) wants to cover his wire parts I don't think that will hurt because if the wire is gonna fail it's gonna fail - there is nothing you can do about the wire - I watched a frayed line hold great in a bad blow on the old A23 boat and then have the nice new perfect stay on the other side bust right out on a tack. The wires get compromised in ways you can't see and when they go it's usually a shock load that pops them - I have seen at least three pop, (two on our old A23 and one on a Cal 24), and it's always when I'm out in the middle of nowhere like crossing the San Pedro Channel to Avalon. (It also always seemed to happen when the boat was extra heavy with lots of people on board).
I have never had a stay break on 'boat' and really I never expect a shock load type stay break on 'boat' because 'boat' is just too damn lite to break a stay - the mast would bend before a stay would break..
In the olden days we did not have those nicopress thingys and we learned the hard way about how trailering can destroy fittings so those are a new thing to me because we used actual threaded fittings with ferrels and plugs:
and Roger reduced the problem significantly be eliminating the old turnbuckles but the whole concept of the sleeve (or "press" collar) cracking is not a new thing for me. In fact it is the number one reason for side stay failures and even with the sleeve fittings the main failure was the same: tiny cracks in the sleeve or press and almost ALWAYS on the back side where you could not see it:
This is the preventable failure that you can avoid - but the only way to detect it is with your bare fingers - you need to feel with your bare fingers on the back side of the fitting for tiny cracks in the press sleeve or collar - 90% of the failures will happen there. That part can be covered as long as you can remove the covering easily in order to feel the fitting and find cracks. I can find them with my fingernail - so far the ones on 'boat' are holding up great but I did find a tiny crack on one of the nicopress collars on the mast raising system where a baby stay connects to the MRS gin pole. (You can be sure I watch it carefully when raising the mast).