Constrained movement doesn't work whatsoever

[Z3ROWOLFHD]

I am trying to decorate my orbiter, and for the life of me there are certain areas where you can manually place stuff and certain ones you can't use constrained movement whatsoever, just constant clipping errors even though the regular placement works. It would be really nice if this was fleshed out a bit more and allowed people to actually place pieces where they needed to go.

[Z3ROWOLFHD]

Also , there are holes in the orbiter underneath the stairs... staring straight out into space. the landing craft ramp that moves when you interact with it. back behind it to both sides on the bottom of the floor has a hole in the mesh