Merged ship will not attach to anything in SPH.

[Notwal]

I built a spaceplane to take things up to about 20 kilometers, where they will detach from the cargo bay and make their way into orbit. When I created a rocket to pair up with the plane in the VAB and merged it with the spaceplane in the SPH, I couldn't attach it to any part of the spaceplane, nor did any attachment nodes appear on the rocket. Can anyone help me out?

 

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[capi3101]

You need to change the root part of your rocket to the bit that you intend to attach to the spaceplane. It's one of the options in the VAB; I forget which.

[Plusck]

The easy solution is - shift-click.

The problem with merged craft is only the root part can be attached to anything, and only if it has a spare node.

If you shift-click to chop off part of a phantom object, the part you grab becomes the root part for the group you just hived off, and it has a spare node.