A big congratulations from me!!

AFAIK the screen washer pump isn't the most reliable.... it may be a good idea to replace it with something better. Previous owner of mine has taken the simple solution to fit a standard pump in line with the one built into the bottle.
I don't think there's any regulator/control box for the windows, but the motors contain an overload switch (temperature regulated I think) - that's the most common cause for failure. Plus wires, switches etc, but Will is right that it's often not the motor itself.
Cheers,
Anders
(Hope to get mine registered wednesday or thursday next week)