Normally no centring yoke on a double cardan used in a steering swivel housing. This is because each side of the joint is supported by a plain bearing in the axle housing, and the short side is supported in the wheel hub. The centre support yoke is used in drive shafts to support the DC because the shaft is only bolted and supported at the flanges.That's a private page, so, I don't know if I'm seeing all pics... Is there no centering yoke on the DC, or are there parts lost in the explosion?