I re-made the slats. Had to cut the remaining jabota plank to 3/8" thick and glue to oak to make a final 3/4" thick slat. Got 1 coat of finish on so far.
With all the different woods in the chair, it turned out looking real nice, not Frankenstein-ish like I thought it would. Swmbo placed it in the dining room, along with the kid size rocker.