@nilrods, I had no technical problems with the butterfly board. I thought the modular approach was the way to go. I still believe that modularity is a good way to go. As has been said it would certainly help keep down the number of boards one collects because of of being able to mix and match various peripheral circuits with the core FPGA and being able to upgrade the core when appropriate. I think Jack has done a fine job supporting the peripherals and would like to see an approach to make the core modular as well. Once again , I thank Jack for all he has done to support the community and look forward to being able to continue supporting him in his efforts. TrapperBob