Allready made, they allow now a height of 25

Have patience, it seems to be something related to the bandwidth of COI-Hub, just a feeling.

hmm, y think y have done it wrong, y wanted concrete, didn't change it? LOL.

Will update as soon as y can, thanks for advice.

Lol, just done.

You must unlock using research, there is a new icon in the toolbar of the game.

There you go, thanks for advise...