Bigger or smaller shouldn’t cause an issue constraining the hardware in solidworks. Just do a concentric mate and it will center them together. As long as you don’t get fancy and set limits parts can go straight through each other in solidworks assemblies.
Also, out of curiosity how did you get your solidworks license? Mine is a student license that I was given, but I don’t think I am going to renew it at $150 when it expires since inventor is free to students.