Jet boat Cobra fins or Thrust vectors

[jbg]

Hi all. I really appreciate all of the insight extended by the experienced people on this forum. I am not new to boating but somewhat new to the Lakes Region. I've owned boats in the past but never a jet powered one. I currently have a Yamaha jet boat and the low speed handling is horrible and sometimes scary to say the least. Does anyone have any experience with steering fins? More specifically, the Cobra or Thrust Vectors. Thanks in advance.