when you get the foot you only want to use the darker coarser hair on the soul of the foot.i trim away around the sides before i use the foot to make it easyer.
as for the amount you use i allways put to much on you dont need alot to make a fly float.if you put to much on the hook cant cock the fly and it sits on its side
since ive started using it i havent used cdc.its great to use and when you catch a trout you can use the flie again
stuart