Thanks guys
I'll keep you up to date on the wing mount, and yes, it's a straight fit for the DEX210, MM only by the way.
As for the wings, I found the LMR Electra wing really nice: tough 1.5mm base around the mounts, about 0.8mm around the gurney and side dams.
The Rudebits R1 wing has the same thickness at it's base at 1.5mm. However, unlike the LMR wing it's also beefy around the gurney and side dams at 1mm. I've yet to test this one, but the sheer quantity of lexan is impressive - it should do well!
Which ever you pick though, it'll be better than the DEX210 wing: it's 0.75mm at the base and 0.5mm at the gurney and side dams.