Hi Iain,
Parasol fly , you must be expecting rain eh ?
I tie these with a foam ball wrapped in a bit of mesh , never thought of Aerowing , Uh Duh . Also like to leave the fly as streamlined as poss. for easy sinking . Once you get into thinking sideways about these things you will be inventing all sorts.
Hows about a comp. for the most innovative /silliest idea Mike ? Could be fun.
I,ve even seen a dry fly tied with a bit of bubble wrap ,including the bubble by the way . It caught a fish !
Here is something I threw together tonight ,a rough Olive, aye a very rough Olive
Paul.