Pablo--this is a very inventive project. I *LOVE* the look of it, however impractical it may be.
Dive-bombers undergo TREMENDOUS structural stresses when pulling out of a dive, so I *really* don't think the "flimsy" supports of your parasol wing would hold (I think the supports would snap, "freeing" the wing, and the fuselage would plunge into the ground!). I suppose the little winglets have "butterfly flaps" like the Dauntless or something to open into the airstream to slow the plane down in a dive?
But again--VERY creative and amusing! Probably your "Thai-dive" aircraft were escorted by my "Misago"s when French airfields were bombed in the Franco-Thai war of 1941.
*You might know that Thailand ordered several NA-69 light attack aircraft ("BC-1A" early variants with guns and bomb racks) just before WW II, but they only got as far as the Philippines, and were never delivered before war started. I have seen pictures of them in their Thai markings.