Regarding the last two posts: The only time I ever want my undercarriage to go numb is if I split my ball sack open. Fact. Reading that is enough to put you off cycling, anyone want to buy a bike? Didn't realise you'd been forced to quit Mace, that sucks. Especially being in such a nice part of the country for it.
Just done a proper first ride
. Not much in the way of proper hills around North London, but there's a decent short, steep one not far from home. Gets a bit repetitive, but 2,500' of climbing without being more than two miles from my front door is pretty convenient. My HR max was certainly not 231 bpm, it seems to have problems registering properly until I'm sweating. Either need some ECG gel or to shave a funny looking patch in the middle of my chest.
Also, hitting speed bumps at >30 mph on a bike you've just built... Nervy. Fortunately it seemed to hold together ok. Trying to resist overtaking the cars that have to slow down to 20 for them was difficult.