You're welcome :smile:.
I had some good conversations in that thread! It's one of RawDog's.
http://www.lpsg.org/142661-how-deep-is-your-pussy.html
It doesn't quite ask the same question though. RawDog's thread is more about total depth (for me around 8" with a toy, more with a human). If I've understood the OP's question right, this thread is asking about the (minimum?) length to hit the deep spot (for me 7"). Similar questions, but with different answers.