Torx Bits

DJ, Have you taken a lot of hard drives apart? I was wondering if T5 was the smallest I could use or do you or anybody else know if I need a T1-T4, and if anybody even makes them that small. I guess what Im trying to say is that I wonder which torx bit purchase should I go through with? My options are this one or some thing on amazon, ebay, and harbor freight. HF has 100 bit sett for $10.00

I took about 25 of them apart yesterday and the torx bits in that set worked fine