No mechanical retracts are suitable for this plane. If mechanical retracts on the 8 lbs 60 size H9 Mustang are already wobbly, then mechanical retracts used on this 11 lbs plane will be even more wobbly and will contribute to more nose overs. Mechanical retracts will cost you more in the long run. Go with a set of Spring Air retracts with straight oleo struts.