If you should encounter a problem with one of our props, i.e. Jumbo Sidekick, Khyber Cobra, etc., please do not attempt to fix it on your own. This may void any warrantee we offer. Always contact us first so we can guide you. Many times it's an easy fix, but if you inadvertantly damage something trying to fix the problem, it could end up costing you much more than it would have.