When i started working for my company i recieved all our 3D models of 8 different types of trailer from an outside source. They were drawn in Solidedge so they were sent to me as a parasolid.xt file. So i have 8 different types of trailer that share some of the same part and assemblys, with each trailer in its own folder. So when i change a part in one, then i have to go and manually make that same change to them all. Im just wondering what is the most practical way of linking these parts and assemblys so that it automatically makes the changes to all.