This gives the possibility that the Flexplate without the damper may resonate being excited by the engine harmonics at rpm ranges normally used in flight.  Such resonance could accelerate Flexplate cracking.  For this reason, I would be reluctant to eliminate the damper while retaining the Flexplate.  Converting to Tracy’s recent solid coupling design may best be done by also replacing the Flexplate with a manual transmission flywheel.

The photo shows a couple of possibilities to convert to a solid coupling while retaining the original splined input shaft.  The thickness of the aluminum spacer or the steel part can be adjusted to accommodate the thickness of a flywheel.

Steve Boese