Aim as a skill check

[Kesendeja]

My group has been playing around with the idea for awhile now, and with a new game getting ready to start I'm wanting to implement it.

Aim becomes a Per based combat check (with all the modifiers in place). Success normal bonuses apply
Critical success normal bonus +2.
Failure nothing happens,
Critical failure applies a penalty equal to what the normal benefit would be.

I vaguely remember a Pyramid article that covered this basic idea, but can't find it. I could be real, or a figment of my imagination, either way any comments or criticisms are welcome.