The Dualsky DS169 is a new generation micro thin digital HV servo that has a powerful coreless motor and a metal gear train that is supported by 2 ball bearings. Weighing a mere 9g it packs some punch on 2S operation, @ 2.8kg.cm torque. Ideally suited to F3K, F5K, RES, e-RES models and for fuselage and aileron operation in F5J models, but we think it's ideal for operating gears doors on models where there's not a lot of room for a servo, and a HV capable solution is needed.