Thanks guys. Apparently, I'm totally looking at this the wrong way. I'll let him lead

I just thought it'd be fun to try out something new, but I guess I don't want to have half a seat tube jammed in my ass. I just saw that extension on a Hampsten and a few others frames and thought it looked awesome. I didn't know if the seatpost penetrated far enough. There was a MTB frame, however, with the extended tube and a very stubby seatpost.