Hi, i would like to suggest this plugin to be considered, it can be a great addition to have if you have already built a base in that tier, but a bit later you decide you want to upgrade it further.
Lets say i have a stone base but maybe a few days or weeks later, i decide i want to upgrade it to metal/armored, this plugin lets me upgrade the full base without having to remove half of the other walls/floors etc.
Of course, it has to be set and configured so you need to have all the materials needed for an entire upgrade
http://oxidemod.org/plugins/building-grades.865/
Lets say i have a stone base but maybe a few days or weeks later, i decide i want to upgrade it to metal/armored, this plugin lets me upgrade the full base without having to remove half of the other walls/floors etc.
Of course, it has to be set and configured so you need to have all the materials needed for an entire upgrade
http://oxidemod.org/plugins/building-grades.865/