Euthanasia chamber

Has anyone built one on their own or does everyone pretty much use a prebuilt chamber like wcs sells ? Just curious and if you guys have built them some pictures would be awesome thanks I advance !

I built mine out of 3/4 in plywood. Glued the seams before I screwed them together. Built it so the traps,carry case fit into the box. Top is a clear Plexiglas lid. Reason for the plexiglas lid is so I can see what is happening in the box. Also the lid can loft as the gas goes into the box. Co2 is heaver than air. That way I can tell how long to leave the animal in the box. Have an adapter through the end of the box just down from the top. A gas line runs from the co2 tank to the fitting on the box.
For me, I open the tank just enough so I can hear the gas hiss into the box. Leave run for 2 minutes. Shut off tank. Leave for 10 minutes. Remove animal. Sometimes, I can get 2 or 3 animals in the came carry cage into the box. Hope that helos. I have been using my box for over 20 years.

Thanks jim just trying to think of a cheaper option for now think I'll try and model off yours !

Built my own also with 5/8 plywood and a 6" viewing glass window in the top.
Build it large enough for your largest cage and the rest fit fine!

Do you uncover your skunk cages prior to putting them in? That would seem unnecessary risk, but if you leave them uncovered it defeats the point of the window.

I built my CO2 chamber out of a 24" piece of 10" PVC pipe, smaller 3-4" pipe for squirrels. Solid back/bottom and plexiglas slide door.