Thank you all for interesting - although a bit mixed - responses to the "flow director" idea. The reason I consider to add these on my next ship is that on my previous push/pull canard(see pic) I had three deep stall/flat spin "landings"..
..but fortunately with only minor damage. One of these stalls was even inverted with both fins broken in the process. Theory goes that the tractor prop slipstream prevents the canard foreplane from stalling and instead you get a deep stall...[:@]...!!
I usually go for a canard foreplane loading of 1.5 but this particular ship would not stall/mush normally..
..unless foreplane loading was increased to 2.00...! That was a surprise to me since none of my previous canards have behaved like that. Do not ask me why since the setup was rather "normal" with symmetrical NACA 0010 main wing at +0.5 degrees and a flat plate foreplane at +3 degrees.
Therefore my thoughts about anti-stall flow directors........Cheers/Harald