Not often do I have to cut the bolts off. I have the blade carrier on the bench, place the bolt head on a socket so that it is held up inside the blade carrier and the rattle gun gets them off 99% of the time. You do realize that the 550 uses the big heavy blades that are used on the 24's and I think that you probably should have gone for a 24 as these are the real deal when tacking bigger areas, only downside is they are not self propelled but they really tackle kikuyu with ease.