Hoppy and Mark, you're both welcome.
I prefer the 5-3-3 but in O Gauge it is very lengthy and requires at least 10-12 feet (based upon using freight cars of 11.5 inches in length). I've come up with different versions including having the shunting end do a 180-degree turn in order to fit it in a 6-8 foot long layout. I followed the premise from the Layout Vision website on how it wrapped around the "Switchman's Nightmare" track plan to fit on a 4x8 http://layoutvision.com/id45.html.
With space constraints in play, I'm probably going to do the 3-2-2 on my permanent layout.