I fitted an XTR booster to my echo team without any major issues. I don't suppose you are trying to fit the booster to the upper bolts on the four bolt mounts? Has the booster been drilled for four bolt mounts? If the booster has already been drilled for 4 bolts, and the top holes do not line up with your frame, then you may well have a problem. If the booster has not been drilled, then you would need to do this, get this done. Also, when fitting one of these to a four bolt mount, remember to use washers above and below the carbon, to spread the load and prevent the carbon failing. You are likely to need to modify the washers to fit to the top bolt holes as they need to fit around the shape of the booster such that they sit flat to the face over the bolt holes. All this takes time and patience, but it is well worth it as it's just about the best booster you can fit, if you can fit it.