Yea, it is harder
On my C-22 with a Boomkicker I have two fiddle blocks for the boom vang. To the boom, I fasten the block that has the becket and cam cleat that thereby provides five to one mechanical advantage as opposed to four to one if I fastened this block to the mast and the double sheave fiddle block to the boom. For me, this is is actually a preferable place to have the cam cleat as opposed to being on the mast.In addition, the mast vang hound and boom vang hound will take more stress as well.After I installed the Boomkicker, I used to have a snap between the mast vang hound and the fiddle block at the mast so that I could set up a preventer (which I never did anyway). As this snap did not swivel well in the hole in the mast vang hound, this snap ripped apart the mast vang hound hole when I was sailing reefed and the vang tight in heavy winds. A sudden gush of wind broadside, and whammo no more vang and as the Boomkicker fell out of the slot on its boom fitting, no more topping lift for the boom. I admit that I was aware of potential problems with this snap, but with my recently installed Boomkicker, I quickly found out just how bad.