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The latest Armstrong A+System promises a better rigidity between mast-fuselage and fuselage-front wing. For large wings upgrading my old fuselage to the new A+System did indeed improve the firmness of these connections.If you already have a A+System fuselage but an old mast or front wing you need the Armstrong upgrade kit to drill two additional holes into the mast and one into the front wing. Arn...

If your pumping setup feels very stubborn and is hard to pump chances are that your fuselage is too long.Adding a second position to most older aluminum fuselages is quite simple. Mount the fuselage on a mill or a drill press with the contact face of the original mounting position parallel to the clamping table and fix it with two screws in the front where the mast usually goes and one clamp in th...
