Thanks so much Luke!?? I don't need much more regarding sterling parts. With the E11D, I won't need the Spring, bolt or inner parts as the charging handle slot and ejection port are closed off. I have a lot of Field Marshals aluminum parts already so I may?? wait to see when he completes his?? fire control / frame assembly. But I am going to check out Sarah's to see how it breaks down. The 2 main tubes are with a friend who works at a machine shop. Hopefully those are done in a few weeks. I hate this waiting! I need something to doooooo!