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In my work, I needed to make such spacers that temporarily held the element for subsequent fixing. In general, I thought maybe someone else will come in handy. The scope of application is very wide. You can use it as a clamp, or you can replace the broken leg of the sofa.
Be careful, here the right and left threads are used from different ends. So you need to print out two supports (Left_Sk&Right_Sk) for each Spacer.
If you use / Connecting_Coupling/, then you can assemble almost any length of support you need from several /Space/.