Yes, I always use tweezers with my seeds, even when putting them into paper-towel to germinate - oils and germs on your hands can spoil or unnecessarily lengthen your germ time/rate. The root isn't really fragile, but you want to be very careful not to drop a freshly cracked seed on the floor/ground, so I use tweezers to go directly from the towel to the hydroton. It takes a bit of practice to arrange the hydroton so the seed doesn't fall deep into it - just be extra careful. The top of the seed shouldn't be covered - it should be suspended enough that you can pour water over it directly without it getting 'flushed' deep down into the hydroton... since you want to keep it nice and moist in there, be sure to only use CFL lights at first so there isn't too much heat that would dry-out the root that's just beginning to grow down...
Here's a nice closeup of my VK went it first went into the farm...
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