Same as many others, Bob the World Builder brought this to my attention- instantly had to mosey on over. I didn't get the bundle thing, but I needed to support something like this.
Out of a personal interest, I like to tweak things here and there- and this ruleset provides a really solid framework. Would you be alright if, in the future, I maybe made a modified version of this? I'd never put it up for sale or anything. Just for some fun between me and friends.