Hi Bondoman ,
A closer inspection of the pic I posted does seem to show a slightly different landing gear arrangement to the one Mach 2 offer with their PBM Mariner , it looks similar to what you would see on the PBY Cataliner flying boats ; Here is a link to the Mach 2 kit ...
http://dpalix.ifrance.com/marineg.htm
Squadron.com had the Martin PBM Mariner in action book and the Air War over korea book , so I have ordered both those to supplement by ever growing stash of Korean War bird kits , hopfully the Mariner book should provide some additional info on the different landing gear set up .
John .