.. acres of good advice. I can't add very much except I've just upgraded the brakes on my 916 with:
~ new stainless lines
~ new Dot 4 synthetic fluid
~ new Bendix pads from Cornerspeed - ask Nelly which ones
~ about two hours de-seizing the bl**dy brake calipers on the righthand side caliper
~ bleeding the air out of the top master cylinder joint
~ leaving a huge elastic band on the brake lever for 2 days
and they're ..... excellento