the drawers are 1.5" from the back
EDIT: they are about 0.25" from the front glass, the vent holes in the bottom are below the bottom drawer and they still have good air exchange.
Edited by JetCat - 1/24/16 at 8:01pm
i appreciate all your input so no grief here!!! there's right at 150 extra large to jumbo size eggs in it now with a little wiggle room so i'll base my staggered sets off that quantity. gotta get an accurate quail egg count but it should be close to 500, i can fit 250ish in the hatching tray of the 1502, each egg tray holds 124 eggs and i can set 4 trays (two double stacked) per shelf in the newer model (only single stacked in the older), that should work out about perfect i hope!!
Thanks, the two that hatched this morning were all fluffed up when i got back just now, a few others have pipped and are cherping so i'm not gonna toss them out just yet. i think the count is 126 chicks.