Thanks for the reply, yea I dont expect this thing to be perfect but just to enjoy some older fighters with some friends so hopefully the fighters are actually working some what decently and I'll go ahead and replace the whole daisy chain along with switches when I order up some new buttons. Confused me when ground loop was mentioned, thought it was in a different area other than the button grounds. Hopefully it's just grounds though or a switch. Don't think they ever messed with the internals on this thing, buttons just malfunctioned and got left in the garage. Do the grounds just stop working from dirt or buildup over time in these things?