Well, I emailed Roden but haven’t had a response.
I also contacted the eBay vendor, who said they’d check with their distributor, which they did, and the distributor said, well, that’s the way Roden released the kit. Which, I’m not sure is true, but every on line review of the kit seems to support it.
I guess my options are,
A) buy a dh4 and use the wings from that.
B) scratch build a pair of wings.
Cheers,
Hugh