To be very honest with you flaps or washout isn't needed if you build very light, I have built many models over the years, and I don't think I have built even one with washout in over 30 years. I keep everything I build in the low to mid 20 oz. wing loading and all those nasty bad habits go away. Oh sure you can use flaps to slow down but you can also cross up the airplane to slow down as well...
Bob