I don't keep Chondros anymore but have developed a cage idea for species with similar requirements. It has since been utilized by a handful of Chondro and other arboreal keepers.
Bear with me here...
This first picture shows a 50 gallon (yes gallons, not quarts) storage tote mounted onto the back of a real-wood face frame. It's turned upright but for a Chondro it would probably be better horizontal.

Ironically, if you look in the background those are the same racks that I built for my friend that his Visions sit on.
Here is the front view of the same cage. Please excuse the condition of the cage. The cage had recently spent a day underwater during a flood and then when this picture was taken it had been quite trashed by a Corucia zebrata and it's newborn.
The cage looks much better in person.

The back of the face frame is sealed with epoxy. With hindsight I'd prefer to use a coat of water-based polyurethane followed by a layer of the vinyl film used in the sign industry.
For a chondro I would use the 55 gallon black box available at any Lowes. I have had arboreal keepers from Washington all the way to Florida find this box at their local Lowes.
Turned horizontal the box would have perch-height dimensions of about 28"x23"x18". That might be a bit shorter than you want but many Chondro keepers have indicated to me that this would not prevent them from using it.
Also, I would build the unit in a way that it was free standing. I have experimented with several ways to do this. I left this one open so I could keep my eye on the sides for leaks, etc. There have been none in this cage or the other three I have built.
BTW, the box is held to the face frame with several 3/4" sheet metal screws and a polyurethane caulk. It is a very strong joint.
At any rate, just thought I'd mention this as an alternative to tubs.
It makes for a cage that is light, cheap, and still somewhat attractive.
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Current snakes:
0.1 Gonyosoma oxycephala - (Silver/Yellow)
1.2 Gonyosoma oxycephala - (Green)
7.6 Gonyosoma janseni - (Black)
0.1 Gonyosoma janseni - (Black & Tan)