As a follow on to my earlier post about rear shocks, I was wondering ow people setup the static sag on the front. I've a set of Landdowne internals in otherwise standard forks, and I think I need to get a bit more static sag. At the moment it does not seem to move much at all, and I've been advised to aim for around 15-20mm. The only way I can see of doing this is to shorten the spring, but this will then affect the spring rate. What do the gurus say on this?