Please find uploaded an assembly drawing with comments from LCI.  The Client is still worried about vapor bypass through the annular space between the tube bundle and the interior diameter of the weir.  LCI propose for Techno Forces review a change to the construction of the top cap of the interanl condenser.  As shown on the drawing, the bolted head has been removed and a welded head has been added.  This allows for a smaller distance from the tubes to the interior of the weir.  The weir interior diameter has been reduced to allow a 2mm clearance between the weir and the tube supports.  Please review the construction detail and advise if this is something Techno Force finds useful.  