RST, I thought we were talking SEL, not glider. CFI SEL DOES require an
instrument rating.

" If I wanted to apply for a CFI SEL, I would have to have
a commercial with a SEL rating on it -- no instrument. "

No, 100% not correct, you MUST hold an instrument rating or an ATP in
order to take you initial CFI checkride for airplane or helicopter.
Gliders are a different discussion.

-Robert, CFI