I have a mac 9600/200 with oceans of ram. I have been using an HP 6mp, and just got an Epson 3000 (GREAT PRINTER!). I want to keep them both hooked up to my serial port at one time, even though I have to change may appletalk to "remote" for the epson, and do some other extensions reconfig every time I want to change, but I don't like pulling plugs and so forth every time. I have been told NOT to use a mechanical data switch with the HP. Has anyone successfully used a "power Splitter" arrangement, i.e., a $60-75 unit with software, etc. to switch from one serial app to another in this type of situation? Is it safe?