Hatchling enclosure advice

[Liz27]

Here is a big plastic bin I rigged up recently as I'm sold on the sealed chamber lol. I use lamp stands for the mvb and have the che inside and the hole covered with foil. I zip tied a one by to the top to hold the che. There is a very small bit of open space where the mvb is but it still rocks solid temps and humidity with a light spray once in the morning.

How high up do you have your mvb hung? And your Che as well? I'm having so much trouble keeping up humidity and am never sure if my mvb is too low,etc. I'm trying to keep it covered w foil but am going to cut my lid like this asap. What did you use to cut the holes? Thanks!