I believe the post you were referring to is the following:

http://ball-pythons.net/forums/showthread.php?t=80758

I only know this because this was my post. For anyone that look at it, I found poo all over the log so I have since thrown it away. I have some questions about racks too. I'm either going to build my own or order the Iris or the one from JasonsJungle.com. I'm just wondering how well my boy will take to the rack after spending most of his life in the cage he's in (the cage on the link above). Seems as it related to opinions round here is you ask 10 different people, you'll get 10 different answers. I was re-reading that post above and one of the posters was saying that my snake might be stressed and not show it. Maybe he's right but I know what I see. He's never refused a meal in the 54 weeks I've had him, he's only had 2 bad sheds (one of them being the first after I got him) so I take that as a sign that hes content. Try a tub out before getting a rack, thats what I think I'm going to do. If you notice changes in behaviour then I'd re evaluate. Keep me posted on how you're progressing. Good luck

Chris