Beta 1.17 more Ship Customizer issues

I decided that it would be neat to create a ship where the engines were not attached by superstructure, but instead were attached to the ship by glowing energy. So I built some engines and put glows underneath.

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When all of these are separate, it looks right in the module screen.

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However, if I make all of the components of the engine structure and make them a composite, it works fine initially on the design screen. But when I flip to the module screen, the composite is broken and they all move to the a single spot.

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When you move back to the visuals screen, then it is obvious that all of the individual components were split up and all put at the same spot.

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Throw on top of this : Gunship visuals are not saving correctly, I keep losing Z-axis when I try saving my designs, and it keeps resetting to defaults, thereby losing layouts. Most annoying! Is yours a gunship blueprint, I wonder?

This was for a destroyer, if that makes a difference.

Looks like the same problem(s) I was having here: http://positech.co.uk/forums/phpBB3/viewtopic.php?f=45&t=10650

And to confirm, I am also still having these issues in 1.17, as my original post was for 1.16.