Dec 25 2022 windows build: Don't know how to make components "attach". I often have "5/10 components attached" and the only way I've found to force attachment is to edit my chassis and re-apply the collision generation. At this point, if I move things around they may or may not attach themselves.
Sorry about that! There are a few bugs in the “welding” system when welding to a chassis. Our workaround is to teach people to build with individual parts, rather than with the chassis builder itself. There are a ton of helpful tutorials and builders on the Discord channel who can point you in the right direction.