I'll also add that I have handsome limited sucess doing this with dead conner 2.5" hdd's (one 40mb worked with it, one 40mb worked when I was manually pushing the arm out, but quit working as soon as I tried this, and a 20mb one died when I accidentally pushed the heads into the platter with the drive on.)

But hey, none worked when I got them, so one working out of three isn't bad