Are these firmware upgrade-able as well for future improvements based on newer firmware?
They run great but there seems to be room for improvement in the firmware.
We will create a open source project on github for our software. Pi should work. We haven't test pi board yet. As long as we have solid result on beaglebone black. We will start work on pi if there are issues on it.
Change the command line param --dualminer-pll will give you little more hash. In ltc only mode, the default value is 800M. Change it to 850 or 900 will increase the performance. However, only some chips can work on 900Mhz. This variety is mainly because the manufacturing process.
NOTE: change this parameter to higher value may cause high temp and damage the device. This kind of damage is NOT cover by warranty