Finally got my 2 Chessie auxiliary tenders from MTH. Very nicely detailed but a bit pricey in my opinion.
MTH includes stamped steel mounting plates and hardware for converting to Kadee's.
However using these mounts the coupler too low. Simple solution was to use Kadee 747 underset shank couplers. Now they're spot on with no shimming.
One of these days I'll get to modifying my spare 614 tender shell to accurately represent her extended coal bunker and change the lettering to Chessie System Railroads.