This will be my 1st rack so I need some help with the measurments. Its gonna house my babies so I'm using 15 quart. The measurments of the tub is 16 1/2 x 11 1/4 x 6 1/4. The measurments I have for the rack is 17 1/2 x 23 1/2 x 36. Does this sound alright? It will have 2 tubs per row & 5 rows. There will be 1/8 in gap between the top of the tub & the bottom of the next row up. Feel free to add your input. Thanks in advance.