I'm getting ready to recable my race bike, which currently has Yokozuna installed. It shifts fine, but weighs a ton. I've thought about going to one of the link-based systems to drop some weight (Aican, specifically), but I understand they can get knocked out of "shape". When that happens, does it affect shift/brake performance?
I don't find that it does. When I first set up my TT bike, the rear Nokon loop would actually flop down so that it would loop upwards to the derailleur. I wouldn't notice anything until I looked down. Some zip ties fixed it. Even if they are a bit weird, usually the tension/release keeps things in smooth enough order that you don't notice anything.