The jig I used to get the 5th Ambo on the Baitrunner (lots of fun) was a Williamson 300g Knife Jig with the assist hook on the side. I can't remember what it's called. The fluro glow one caught a double header of undersize Ambo and Kingie and the Blue/silver coloured one nailed the 8kg ambo.
Loads of fun !!!
dave