I think it would be cool if sentry turrets could take a speed upgrade which either reduces the wind up time before it starts firing, or reduces the time between damage ticks. Currently they only take the range upgrade (I think). Thanks for a great mod!

The reason for not doing that is balance, because sentry turrets require no pressure to operate. Any further boost to their ability would be OP.

That said, I have considered the idea of an advanced sentry turret which could take (more) upgrades, and would require some pressure to run. So I'll keep this open for now.