Well I didn't say they were whiffs-in-a-box, just that they were of likely interest to whiffers, i.e. oddball aircraft and/or unusual markings.
You could use the Siebel Mistel fittings for all sorts of shenanigans: swap the DM-1 for a P.13a or a DFS-194 (prototype Komet), or swap the carrier for a glass-nosed Si-204 D/E (currently in production) or even an Aero-C3A/B (same thing) and make the whole thing post-war Czech....