LMAO!

OK, well I had the number of the MAC brush incorrect. The number of the MAC brush I have is now 266 (the one I have is older and had some other number but it's now the 266 brush, angled detail eye brush basically). I'd heard conflicting reports that it's most like Billy B's #12 or his #11 depending on who you talk to (that's where I got 12 from) so I went and tried them out for myself and it seems that Billy B #12 is more like what I'm looking for so I got one and I'm going to try it and see if it acts how I want.

Small angled detail brushes are tricky, I find, cos they're either too soft and don't do precision or they're too hard and painful (more like brow brushes)