MOTM

Last night I discoverd a nursery of tiny arachnids in my open-backed 
synth enclosure. I'm planning a nice cabinet with the help of Larry's 
rails, but I'm unsure about the back.  I was going to cover the back 
with a wooden panel, or do I need more ventilation?

thanks,
joseph casbarian
   
-and if your concerned about the welfare of the spiders, don't worry, 
only a few were smashed. I think Mommy flew the coop before I could 
get her.