that is handy !
I have one humble suggestion. There was recent discussion about recoil management and in it, this was mentioned :
http://re-gun.com/2011/04/ball-and-dummy-for-dummies/
It talks about, how ball and dummy some times doesn't fix a flinch effectively and alternate way of fixing it. I found it to be very beneficial FOR ME. I'm guessing it may be for others as well.