I have an issue with my lathe that we seem to have narrowed down to the master board, and will soon have a replacement. I have backed up the parameters, is there anything else that needs to be backed up before the boards are swapped. I know the plc parameters are not easily accessible, are they on the ROM card and can I loose them? The three daughter boards, the BMU memory, CRT/punch and ROM cards will have to be swapped, will the three large chips in the middle of the board have to swapped as well? Will I have to reload the parameters after swapping the boards on the master? Is there anything that I should watch out for in particular or is this something I should just get a service person in to swap?