OK, so I was looking at 3-D printing a floss roller while I waited for the tank to come in and then I noticed online innovative marine has given specs to The rear chambers of the 20 gallon tank. When you compare the right and left side on the image, one chamber is listed as smaller than the other however, when you compare the other tanks in this lineup for desktop, they are all showing 2.8”x2.8”. Can anyone with a fusion 20 long verify that the two outside chambers are the same dimensions