Rack Question

[Will]

I'm in the process of building a new rack for my snakes and have a question for anyone who can answer this. I have decided this time to add a 1/8" gap between the top of the rubbermaid and the top of each shelf. I built the last one without adding a gap and the fit was so tight between the rubbermaid and heat tape, that it would always stick and occassionally pull off part of the heat tape(NOT good). Now I've gone about adding the extra space to ease the sliding process, but I have that 1/8" gap at the top of each tub. Now, right now it isn't a problem since all I have are adult and yearling Calis, but I will be recieving a pack of baby hondos in the next month and am now wondering if the babies will be able to squeeze through a 1/8" gap. Has anyone done this and had escapes with this, or do you think a baby can fit through...? It's been awhile since I've had a baby snake, and as I recall they are freaking tiny. Any suggestions...?