Judging by the thrust on the ground of the OS 52 I mounted…...it seems sufficient. The kit for $200 bucks is a great deal. I finished it yesterday and balance it without adding any weight. A heavy hub will be all it needs to get it between the balance point of 3-3/8 to 3-7/8. I managed to get the battery up in behind the instrument panel. I believe adding 2-3/4 dubro wheels will probably bring it in to the ideal balance……Time to start the next project….Dynaflight Fly Baby with a G23…Happy Flying….Johnny