I seem to have an issue where if a player builds a reactor it tells them that it can be max 5 blocks in the X dimension.
The config is set to default which is 32x32x48 so not sure why it is refusing to accept the larger changes.
Its using basic reactor blocks so does this need to be reinforced for it to work?

Appolgies, re-read the smallprint and notified them they need reinforced :)