I have recently incorporated into my systems several "Mobile Rack" removable hard drive bays (these have been discussed recently here) which have what appears to be a Centronics-like plug as a docking mechanism. (These look to be very useful as I can keep my own stuff on one drive and keep a client's stuff on another drive, plugging them in and out as needed.) My question pertains to the longevity of these plugs. I wonder if I should avoid plugging and un-plugging my hard drives as much as possible, or if these are very robust and can be plugged in and out many times before wearing out? I know a few of you swear by these devices and I wonder if you have seen any wear out over frequent use? The ones I bought were $25, and saved me $5 for mounting hardware, so they are not real expensive and might be very useful over the long run, but I can't afford to have them go bad after ten or twenty swaps! TIA, Dean Kukral