HI, i was just looking at precision cagings site and might be interested in some of there cages.Has anyone here ever used any of there cages? I am more interested in the 48" x 20" x 13 1/4,and the 24" x20" x 13 1/4 sizes.Also if anyone has used these or have these cages,did you change the heat source? I am not to thrilled about the light inside,prefere belly heat if its possible.Thanks for any replies