RE: Skymaster L39 build
as for gyros, all my bigger jets have them, Boomer xl, SM L-39, and the SM Hawk, but the two Facets I have, 2300 and the new 1700RG do not.
At liberty Bell Jet Rally, I had my gyro go on me on take off, as I rolled out on down the runway, I powered up, and just before rotation, the gyro sent the boomer into a very hard right turn and into the corn stalks. minor damage to both wings and the nose, but fixed and flew yesterday.