Hopfully I am understanding what your saying.....There are two o-rings that are on the center hub that the spindle goes through. As you use your heli these o-rings will become warn and will be more stretched out. IMO holding the center hub straight up and down you should not be able to touch the end of the blade to your boom. If you can then it is time to replace these o-rings. Take care in replacing them, you can stretch them out durring instalation. You may also want to install a couple shims. These shims (you can get them from horizon hobby) will make it even stiffer. Hope this helps.