Chris King (IMO) are the biggest waste of money there is. You pay a lot of money for a hub, which in its standard state probably isnt good enough for trials, so they make you pay even more money to "upgrade" it to what you need.
Eg, Fun Bolts, King Cog, Steel driveshell (extras probably around the £100 mark to add on).
I have recently got myself a Profile (the one that fits on mods) on my stock and you get, for a much smaller fee, big bolts on the axle, wide based sprocket, a very solid reliable hub, with more hten enough engagements.
I cant see why everyone wants to pay sooooo much for a King, then be ripped off by having to buy other bits to make it withstand trials use, when hubs from other brands already come with the same kind of stuff.
Feel free to argue back (Y)