I use the professional version of Onshape for work. If you create all the parts that relate to each other in one part studio. It can be all contextual. So changes that are made to one part can automatically update on the mating part. I would recommend you watch onshapes introductory videos on their website. That are surprisingly informative and short and to the point. Also their help guide has almost a video for every tool in it.

Would they change the acronym to rwf for reddit was fun or lif for the obvious?