Not elusive, well not like some!!
It is from a mainstream country and well known manufacturer
but so far empty trawl...
I've now found reference to the airfoil section on a second site, so it's worth pursuing IMHO
Not on wiki though, except a red entry in the
list of aircraft(A-Z), so not that obscure!
Edited to clarify the remark about wiki. The manufacturer certainly is on there, but this little fellow isn't listed or mentioned in the main entry, despite it being one of the first half dozen aircraft, perhaps because it found no market.