Not sure if you're dead set on baystar, but I just installed the 120HP version of this hydraulic steering. Link-->
Hydrodrive Steering . I only have one trial run with it but it's nice and smooth. Everyone around here goes with Seastar or Baystar, but this brand is much cheaper and seems to get good reviews. Seems its very popular in the UK. So I figured I would try it out instead of spending the big bucks on Seastar.