i dont have jesters, but i have some dukes. they seem to be the same idea, one just weighs more and tours.
i have fks race that were on my motherships, that my dukes are now on.
When i switched over to dukes, immediately i noticed I had more control of the ski, I think this is because the duke sits a bit higher, and its contact points with the ski and boots are much wider. I have not sent any big airs with my dukes, but i feel like they could handle that no problem. I have not released from my dukes on 10 din.
Before when i was riding the fks, i noticed that i had to adjust the forward pressure on the binding about once a month, slop develops in the toe..... The fks binding released once, on 10 din all season, it was on about a 50 foot air to uber deep bombhole landing. I hit a massive rock mid winter, and if i had lost that ski i would have died. The FKS has great retention. If it had a bit more lift, and wider mounting it would control the ski just as well as the duke, but then again i cant throw my skins on and hike a peak with my fks. Also if you ride an all wood ski, you will most likely tear the fks heel out of the ski.
it will be interesting to see the new fks built for big skis not 68 waisted race skis.