Great Planes .60 size mechanical retracts are pretty good. They are 85° and have very little play. Plus, the struts are durable and don't bend very easily. However, 11.5 lbs. is on the borderline of being too heavy for these retracts. Check out the same retracts being used on the 11 lbs. GiantScalePlanes.com Spitfire:
http://www.rcuniverse.com/reviews.ph...w&reviewid=117