Heal up Machka!
Ack, that sounds like a nasty spill ! The wet conditions were a real challenge, and the many hills of the route combined with the odd bit of tire-track mud didn't help either. I have almost zero brake pads left after that ride - wet weather just chewed em up.
Good on ya for attempting the 400! I didn't fall, and I'd still be afraid to try that distance. Again, was great to finally meet you and I hope you heal up quick.