yes i did. my feeling is with these type of fins,which i have something similar don't hold a chimed bottom board that steady for walking up and down the board.
watching surfers on logs the other day at the alley, they all had big area fins. must be something there.
also i think i could hook a harder turn with a fin with some more bite seeing a my log doesn't have any real edges to pivot off. im just using some of the ideas i've got from surfing the big 666's too
have a go anyway.