My playing cues are Lucasi's with the Uni-Loc joint. I wanted to get a Predator BK2 break stick but was wondering if just using a BK2 break shaft on my Lucasi butt (since they both have the same joint) would perform as well as the BK2 butt/shaft combo. Just trying to save a little money. Does the butt actually affect the playability (of any cue) or is playability mostly determined by the shaft and tip? Thoughts?