Another Rack Question Thread

[Slicercrush]

I know, I know, there is a ton of these already. I've looked around a bit, though, and it seems that mainly, I only find tiny bits and pieces of what I need. Recently, i've been finding myself on Morph Market nearly every other day, looking and browsing around. I want to get another BP, probably a nice morph this time around, but don't have a ton of room for another bin on my dresser, so I've been looking around at rack systems. Maybe i'm missing something, but what are some of the main things I should always be taking into account with racks? I've mostly been watching dimensions, max bin size, heating, etc, but is there anything else I should be keeping an eye out for?

Also, been looking at the V-70 3 tier from Cserpants, does anyone have any experience with that rack? Would be nice to get some extra info.

Edit: Also Looking at Vivarium Electronics thermostats for when/if I upgrade to the rack as an alternative to herpstat, any idea if these are good quality as well?