I am creating an assembly that requires 4 linear bearing w/ spring like a shock absorber. Each subassembly will be mated to a ground and top plate. When engaged, the subassemblies will move and up and down w/ spring compressing as well. Out of the 4, 2 of the subassemblies work. However, when I attempt to mate the other 2, same mates and edges, an error pops up saying it is over defining the assembly and causes everything to go out of whack. Any suggestions?