I'm glad you liked it. When I ffirst discovered the concept I was very happy with the results and still am. At first i didn't know what you meant by $12 but I assume you mean brokerage costs. Yes, AIM RE-bal is more costly in that regard. Perhapes a min buy amount would be good in order to eliminate a lot of small buys / sells.
Check out my new (just posted tonight) trading system called "SR". I think it has lots of promise. It's another AIM hybred. Now that I think about it some aspects of SR may be used in AIM RE-bal to enhance it even more.