Believe I answered this question over on HS, but here goes. The pic you include tells it all. Bird features the bulged belly, so you don't have to worry about that. Note that the lower 2 cooling gills are squared off, not cut back as on your kit. Loon Models (Available through Roll Models) makes a set of the proper cooling gills in resin, already cut from the casting block and ready to fit to your Tamiya kit. They won't fit the Hasegawa kit, the cowl is about 1/16th inch shorter than the Tamiya. I used Hasegawa gills on mine, and it was one heapin bundle of work, but the Loon conversion was no