I just finished testing several props.....
Best one by far was the 5 blade Maximus. I just sent it back to BBLADES (THANKS Brett) to have the defuser cut down 1", diameter cut to 15.25 and labbed..... should spin me at 6000rpm and roughly 84mph.
Get this all done just in time to sell it.... go figure.
I am not a Magic Deck owner, but I am sure the guys and girls that will be interested in this thread will probably want to know what power/drive/headers/etc you are running. The prop doesn't mean anything without that info.
84 is moving pretty good on a deck. Do you have the 28 or 30?