I put a new Teleflex NFB system on my boat when I repowered early last year. I upgraded from a non-NFB system and the difference is amazing. I only paid like $130 for the helm and cable from
www.boatfix.com. I just couldn't justify spending $700 on a hydraulic system. No regrets so far. It steers like a dream.
BTW, the boat is a 20' Grady CC powered by an '02 Merc. 150.