Hello, I've been running an open MP game and here are my feedback:
Infinite research have an exponential cost which makes them prohibitive quickly.
There is a out of ammo warning flashing constantly altho the turrets have ammo
The master chest cannot be disabled ? I like to belt my turrets
The waves are capped at 100 per wave which is way too low.
East/West warnings are swapped
The waves should come from a different direction each time, or maybe 2-3 waves then change direction. In that case a message saying where the next wave will come would be great.
When expanding into biters territory, and a new player joins, nests are spawned inside captured area.

Thanks for making the mod!

Also, it crashes when trying to spill tokens when the heart is full:
base_heart.surface.spill_item_stack{
position = base_heart.position,
items = {name = "tde-dead-biter", count = count - inserted},
enable_looted = true,
force = "player"
}
API Reads: spill_item_stack{position=…, stack=…,
Control.lua:381