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I was just reading about someone doing this today... Wish I could remember so I could link it to you! He only does it with his super docile one (can't even remember the species)... I think you'd probably be okay as long as you did it with your more docile Ts, and were willing to deal with the consequences if things didn't work out.
Oh no please don't. Sling have delicate fangs that can get injured if they hit human skin. Bigger ones are more no, no. Some Ts can miss a moving target and bite you instead.