after the fast shipping i got my screwdriver to open a rng150n. was astonished that the screwdriver worked. it even removed a hack screw that i completely mutilated with a needle nose pliers. i'll probably need to order a replacement screw for that one screw. broke off the plastic tab, and when finished i popped the new tamper tab from set back in the rng150n. everything took a few minutes and didn't seem like work. actually it was fun and exciting. thanks for all your help.