Is it a hard limit of 20kts or is it similar to the Lear where they only quote a demonstrated crosswind of 25kts in the manuals and under Private Ops you are free to test your cohones above that should you wish?
I would imagine it would have a larger rudder than similar types with tail mounted engines since the asymmetric forces in engine failure are greater given the mounting position. Does the article mention the asymmetric handling qualities at all.?