Rumor has it that Tony Duell may have mentioned these
words:
That was my thought, too. I've seen good sets that have TX6, 7, 8, 9, 10,
15 and up, and I think there's such a thing as a TX12, tho I've never seen
one in captivity. ;-)
I've seen modern hard drives use both TX6 and 8.
"Merch"
T1 torx exists. Take the IBM thinkpad 701 series thinkpad
(butterfly) and look at four tiny screws across the front of bottom
casing. That's T1. I have known of T5 and T4.
How I know? I own two 701C one for parts, one working and ordered
parts for 701 and 710 via their local servicer authorized shop.
Cheers, Wizard