RE: crow braking
Yes a small amount of crow mixed in at full flap postion should help a lot.
As this puts the outer span of the wing at a negative angle of attack(washout) this should reduce any tip stalling tendancy as well as reducing float on landing.
I am surprised you have up elevator mixed in with full flap as on my models (Carf Hawk and Flash) I have the opposite.
CGposition can also have a big effect on landing speed.As you throttle back on the approach if your CG is too far forward the nose will tend to drop and speed pick up needing up trim.
It is a matter of balance between the the safest CGposition and the effect full flap has on the trim.
To check CG postition I always fly inverted to see how much down elevator I need to fly level.A small amount of down is desireable as for safety sake I always like a forward rather than rearward CG.Once you are happy with the CG you can mix in a small amount of elevator to correct any nose up tendancy on full flap if needed.
Phil.