I am in limbo about having my rod replaced w a hotrod or a carillo rod. My rod has too much up and down play. I'm gonna say around .008-.010. I'm just wondering if this will throw off my balance? Is the 400ex crank balanced by the counter balance and flywheel or will it need rebalanced w the piston and rod I'm gonna use? Are the aftermarket rods and pistons stock weight? I know the crank balancer timing gear will have to come off ,I suppose, in order to get the new rod/bearing/pin off and on. What if this doesn't go back on aligned up perfect. I planned on letting sloans do it or someone that is recommended. Any advice would be appreciated!