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@hippy
Most people are tight in the hips.. they don't stretch and have seated jobs.
I forgot about this which is another method I used when testing position changes.
"That said here is a way to get your ball park fore/aft saddle position. Note I'm not talking about reach from saddle to bars. Saddle to bar reach is a separate deal and should not be adjusted by moving the saddle fore/aft. Reach is a function of toptube/stem length.
1) put your bike in a medium easyish gear and ride up a very gentle grade. I use a 42-17 up a slight grade where I can maintain my natural cadence of 85ish without great effort.
2) put your hands on the tops of the bar next to the stem and ride relaxed like this for a bit. Let your body fall into a natural arch and relax.
3) now, with your body relaxed, lift your hands from the bars WITHOUT sitting up or changing the angle of your hips and lower back. Lift just the hands off the bars. Just and inch or so. Do not sit up.
3a) if you can do this without strain or by using a great deal of core strength then your fore/aft saddle position probably isn't bad and is in the ballpark.
3b) if you have a hard time doing this even after a few tries then it's a pretty good bet that your fore/aft deal could use adjustment. If you tend to fall forward when your hands are lifted it's a good bet your saddle could go back. If you tend to fall back then your saddle is way too far back. The latter is pretty rare."
http://www.serotta.com/forum/printthread.php?t=51424