Greetings, I’m building my first AR-15. I have all the parts except... a jig and a vice. I have an aluminum lower. I have two different home drills with all the bits except 5/16 I believe and maybe another. I found a deal online for a jig that includes a polymer lower and the necessary drill bits. This got me thinking about getting the polymer lower as it would be easier and it’s a different color that would make it unique. My question is could I use that jig to also construct another AR with my remaining metal lower? I’m asking if all jigs work for both plastic and metal? Or does it depend on the individual one? Does the gen 2 easy jig work for both metal and plastic? Thank You and apologies, this is my first one so I’m learning as I go.