For my next engine (will get probably next week), i want something different from o.s., I have 2 ninja's and 2 vspecs. I want a clockwork motor, and since they are all really good engines i know i can't go wrong. So i am down to 4, the jpx .21, werks b5, werks b6, jl .21. So basically i would like to know which one is easiest to tune or would be the easiest coming from an o.s. motor. It's all i know.