This one is driving me daft and I can't find a solution neither online nor through trial and error.

In the screenshot you can see I've made a drawing called loco components. Under here I've drawn some components for a wagon I'm drawing in another folder. The idea being that I can just pull in pre-drawn components save redrawing them. Note no problems with the timeline.

Above is the wagon I'm drawing and no matter what I try I can't get the axles in without multiple problems. Problems are things like lost plane reference or just compute failures. Hence all the yellow in the timeline.
I've tried making the axle a standalone component; copy/pasting the wheels group and copy/pasting the whole component group. Note that there aren't any links between the wheels components and the components above that group.
Please help my greying thinning hair
Kev

In the screenshot you can see I've made a drawing called loco components. Under here I've drawn some components for a wagon I'm drawing in another folder. The idea being that I can just pull in pre-drawn components save redrawing them. Note no problems with the timeline.

Above is the wagon I'm drawing and no matter what I try I can't get the axles in without multiple problems. Problems are things like lost plane reference or just compute failures. Hence all the yellow in the timeline.
I've tried making the axle a standalone component; copy/pasting the wheels group and copy/pasting the whole component group. Note that there aren't any links between the wheels components and the components above that group.
Please help my greying thinning hair
Kev
Hairlessness now avoided.