I believe he’s trying to make an unanchored object with motors that are ‘locked in place’, so they don’t move again while the entire object is still unanchored.
There’s a script in the Toolbox from @Crazyman32 that autowelds parts. Usually I put the script in a model, and anchor the model. It will create welds for it, and unanchor the model. You can either copy and paste the welded model in, or keep it like it is (generate the weld on spawn).