#### Vara

##### Active member

Yesterday(and many times over the last year) there was a question about setting up rigging and getting the right tension,which I answered by directing to Selden Manual where they outline the method I have always used to measure the stretch in the shroud with sticky tape,tape measure and vernier gauge.(Very Blue Peter).

On thinking about it I think you could achieve the same result by calibrating your bottle screws either empirically by measuring the uptake of x revolutions of screw x2 (to account for double action) or by calculating using pitch of thread.By then calculating the stretch required over entire length of shroud you could then apply correct tension simply by whacking on the calculated number of turns on the bottle screw and thus eliminating any setting up or measurement once the initial calcs had been done.

Anybody see any problems with this?Or am I merely reinventing the wheel and loads of people have been doing this for years and not telling!