I am very thankful to have this new Rack, It holds 4-41qt tubs and I just had to post a positive review. It does an amazing job of holding a solid temp, really I was worried that my temps were dropping to low at night with my home made rack i think that the tubs are well insulated with the walls and what not. The point of this thread primarily was to state my opinion regarding professional rack systems I am sold on the stable temps they provide even with my room temp dropping during the night. very pleased . also this week has been very exciting for me I also recently just purchased a female butter from Mike at constrictors unlimited I should be receiving her later this week. I have nothing but good things to say about Mike Wilbanks he is very easy to work with and produces amazing animals, I cant wait to recieve my new female and post some pics of her for the forum to view.