This hasn't been said yet.... ditch the Zingers. Some old school guys still use some big Maple wood props at our field. But all comparisons in plane performance prove them wrong.

There was even a zinger ground tested that yeilded several hundred RPMs more on the ground that produced such a perfomance decrease that the plane crashed on take off. It had just flown well on a beechwood prop, the pilot was warned that the zingers are only used to stir paint by the rest of us.

All the beechwood props and especially the laminated ones are superior to the maple ones.
just my .02

I would try a good beechwood 18x6 on the Fuji and an 20x8 on your ZDZ