My dad has an ASP .61 with a tuned pipe on his, not usre of prop or fuel but it's pretty rippin'. DOn't know about hovering on aerobatics, but he had to put like 4 oz. in the back of it. heavy up front! We don't fly it too much though, so I can't help you out too much more that that, but it's got wayyyyyy more power than it needs!