You have to customize the avalon options for your number of boards. The first 20 remains but the 10 means i have 5 boards. You count your boards that are chained with CAN, regardless if bitburner x or xx and take that number x 2. In my case 10 because i have 5 boards chained.
Isn't the other way around? The first 20 is the number of boards multiplied by 2 and the next is 10 that is always constant.
Quote from burnin's site:
The most important option is avalon-options which argument could look like this: 115200:16:10:35:360, this sets the frequency to 360Mhz for a 8 board cluster.
The first part is the baudrate, always 115200.
The next value is the number of miners, this must be the number of boards in cluster multiplied by 2.
Then the number of chips, always 10.
You are right...