Colubrids & Vivarium Electronics VE-6 Rack

Hey everyone, I’m looking to get a Vivarium Electronics VE-6 Rack for my colubrids. My question is that, does anyone have any issues with escapes with them? Most of them are younger Honduran milk snakes, king snakes, and then some beauty snakes, so I am worried that they may be able to squeeze out from the gap, but unsure how large the gap actually is.

Any input on this would be great, thanks!