Shawn and a few others would stomp a mudhole in me for this. But I have been using those pc slot adaptors for extra usb posts on my 30, 73's, and 74's for years with no ill effects. I forget if my 29's have the pc slots or not. My collection is in storage at the moment or I would get one and check. Mind you I just use them as data transfer for thumb drives. I use the regular usb for anything that requires any real voltage like external hdd's. I've also used them for my track ball dongle. But I use the regular usb for my wireless when needed.
CF-29ET, CF-28ST, CF-30G , CF-M34, CF-19Ch, CF-19FH, CF-19CD, CF-73 mk1, CF-74K & H, CF-51RCB, CF-51RCL, CF-52CC .
As long as the deal is good for you it is good for me.
Member of Toughbooktalk and Notebook Review forums