
Having to remove the serial board to install MFX was a deliberate choice. We figured that the vast majority of people would not be using serial port devices and the TCP/IP communication option would be better in almost all circumstances.
[If there was a huge demand (and there obviously isn't), producing an external board with most of MFXs features would be possible, either using the FPGA which would make the board pretty unwieldy, or using discrete logic to make a sort of CFX with NFX. (Neither of these is going to happen though.)]
regards
Dave