Well, if we're comparing mainsheets Robi.....


Here's a pic of my 7:1 off the Stealth. The system is set up so that I can't quite get it block-to-block (but very nearly) So the taper is only 5ft. It's made up the old way - two separate lines. The handheld part is 8mm braidline with a dyneema core. The taper is 4mm dyneema. The overlap of 4mm inside the 8mm outer is about 18".

I started by exposing 18" of core which I then cut off. I then sewed the new thinner piece of dyneema to the core. This joint was then tightly whipped over about 1" either side of the join.
The outer cover was then pulled back over the join effectively burying it 18" inside the sheet. I then sewed through the sheet over the length of the overlap, and finally stripped back some braids from the outer to form a 'smooth' transition from 8mm down to 4mm. This part of the taper was again whipped to make the taper fairly even and I finshed it with a tightly wrapped piece of tape.

It's been in use on the boat since I got it in March and we've been out in quite a few blows since. It runs beautifully and having unwrapped and checked the taper a few times I am happy that it has not moved at all. You'll note that I have shortened the anchored end slightly and that is what is tied to the top shackle of the upper block as a temporary measure - I'll get round to cutting it sometime!