Talk about valve lock GEEZ...Seems worse than stock valve lock.
Carl, you will love the SS power boost. Travis is very correct, the SS valve gives an almost regulated like ES on a handful of shots string once you get it tuned. If the poppet feels tight in the hole when you install it, then spin the metal poppet stem in some fine wet/dry sandpaper to smooth it. Mine took to getting stuck until I did that.
Nice shooting Matt, it is all about trigger time and seeing what slugs shoot the best at what fps. The groups will get tighter with time. Keep an eye open for dirty barrels, that will mess up groups too. Bummer about the shakes, at least you go to do some shooting!