Thursday Night - Hour of Power

^^ this. I think. Unless I've misunderstood.

Spent the last 90 minutes on the turbo fiddling with seatpost height and saddles. and then spinning. like actually have the pedals going round more than once a second. have reached some kind of possibly comfortable agreement between them all but I guess I'll find out tomorrow.
/major fit adjustment before big ride stupidity

(the experimenting included a saddle i've borrowed from Edwardes - the most amazingly stupidly light (and stupid) saddle; Ti rails with a small arse-shaped section of carbon fibre on top, nothing more. not as uncomfortable as it sounds, but once the novelty wears off the numbness sets in...)

It's really easy to set your saddle too high based on how you feel on the turbo. It's static, so the tendency is not to allow that little bit of give you need when minor road irregularities give you a little push upwards, or the bike 'counter-rocks' against your pedalstroke, or you stand heavy on the outer pedal at BDC when cornering, etc.

Err on the side of caution, and remember your hamstrings can shorten over the course of a ride too, which will exacerbate things.