If you are using copper, why not just solder the joints?
As far as th left over copper pieces, I used hot water with a lot of pressure. Also, After I soldered evrything together, I let my manifold sit in a Bleach/Water solution for a couple of hours, then thoroughly rinse. Good luck and let us know how it comes out. Pics would be great!
You Can Give A Man A Fish and Feed Him For a Day, or You Can Teach Him To Fly Fish And Spoil Him For Life
On Deck Hmmmmmmm
Primary Sessionable IPA II,Simcoe Sevada 26, Bier Muncher's Blonde Ale
On TapMaiBock Helles has Wings 5, Sessionable IPA