ORIGINAL:
hellacool, you are actually better of buying the 18ss and selling the 18ss motor to buy a CV-RX. Towers has $30 off $200 or more so you can get the SS kit and CV-RX for $419 shipped. Sell the 18ss motor for $50-$100 and you're back to around the same price as the 18ss kit and you have a way better motor.
That is what I was thinking. The whole point of me upgrading the engine is to just get some stability. Everytime I go to run my MT2's I have to mess with the mixture. After about a tank in each car I get them right. The T15 does not seem to hold a tune at all.