I was thinking about that, and I feel the counters, speed controllers are useful for this.
But still you can control the throughput by connecting multiple belts between two dividers and pause everytime one of them.
- 60 [Paused] -
200 - [balancer] - 60 [Running] - [balancer] - 120
- 60 [Running] -
- 60 [Paused] -

