on the JBL replacement cloth grille inserts for the L100

I have seen them stuck all over the place

Would greatly appreciate the exact placement measurements for the corner on an original unmolested example

(unless of course there was no such thing and left uo to the end user)

Thank you if you can help; I'd be very much interested in knowing the placement measurements on the original Quadrex foam types as well (but only if taken from an original or an exact reproduction)

Thank you

Thoams