Well, I presume they would change it. I am currently using Craigs CR-calculating system which takes into consideration the wealth of the creature, which would include such things as Grafts etc. So, having many grafts might bump the CR by 1 or 2. Hmmm... sorry for slowing down our Sahak project a little, have been having trouble with getting work done and getting online... Been moving twice in one week, from place to place. It kinda annoys me that I havent a permanent residence... grr..
Anyways, tata