Arrived today. Thanks. I did the recommended tear-down/reassemble. A couple of the cards were slightly out of the grooves as could be expected from shipping. Only a few of the heat sink  screws needed an eighth of turn or less to tighten. Hashing away at 38+Ghs on high clock no problem. Glad I didn't pay the extra premium some are asking for verified 38 Ghs!

Thanks again!

Tom