I have had a question if there could be a maximum player function.
so he could have server rule "No walkers until 8 vs. 8". i made a special version for him so he could use it right away. And this will also be included in the next update.

For people interested in the Special version providing this function:
http://www.resix.org/?dl_id=4

Edit:
Maximum Players has been added to battlenimix 1.21
Dowload here: http://www.resix.org/?dl_id=5