They have to be done on a residence/in the wild on EMC. They also have to be yours, incase you didn't figure that out from the beginning More on this soon :3
Bump, bump, bump bumpy bump bump fump fump fump fump. (<-- Read in George of the Jungle theme tune pls)
I built this on SMP9. It's solid quartz BTW. It also have 4 symmetrical sides I was too lazy to upload