When I saw the aquatic update coming up about a year ago and i wanted to use that stuff for my adventure map. Been waiting all the time for worldedit to upgrade etc. now I found out that if I upgrade my world (still got a copy) all my command blocks get messed up. And fixing that mess is a no go. i'll guess i have to continue in 1.12 till its finished. too bad. Anyways here is a sneak peak!