I am continously recreating parts that are very similar, and am looking for a way to insert them into assemblies from a library of some sort. I would like to know the best practices for creating a part that would be used as a template. I want to insert the part into my assembly multiple times, but would also like to change the lengths accordingly, as needed to match the existing assembly. I need a way that the new inserted part I will be creating is not associative to its original file, so when I change lengths, the original part does not. I would also like to know if I should use a template or design library for this. If you could elaborate on the best choice, that would be great. The lengths of these parts are very important, and if there was a way to link that length dimension to a BOM in the assembly drawing, I would love to also get information about this.

-Thanks so much