G'day Graeme,
I've got the afternoon off for a change so a chance for a look at your latest.
OK...Now you can try your code search...definitely in Aerofiles!
Well; I dunno if you chose that one specially you cunning bugger, or you just struck lucky
!!
It is in Aerofiles; but the code is wrong! It says it's a two-seat open biplane (it's obviously closed) and there is no mention in code or the description that it's amphibious or a flying-boat
!!
S2L 1931 = 2pOB; 400hp P&W R-985A; span: 34'6" length: 29'5" v: 137 ceiling: 16,900'. POP: 1 as XS2L-1 [A8971].
So it took a bit of weeding-out 
!! 'Tiz the Loening XSL-2R and a very good challenge to be sure
Loening XSL-2R US Navy | Flickr - Photo Sharing!