I find it that a bouncing happens when the elevator is relaxed. Yup, you think you got the run way, you flare touch down and relax on the elevator. Then follows the death bounce

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Even after touch down don't relax the elevator. Maybe now that you've flown it enough, you are coming in with more speed (?) knowing that it will slow down. Try to pull a wheelie after touching down the mains.
I would advise not to change the crow/flap settings as you want to continue bleeding airspeed and lift through your roll out. Crow will kill lift.
I recently increased my KC flaps to 45 degrees and 1 inch [X(] of crow. Now she finally slows down nicely with a short approach.
Remember to hold that elevator!
Raf