You don't want to stand a cue case up by itself anyway. Think about this for a second. Presumably you are going to have it open and the cues either assembled and in the case or leaning against the case. So, do you want all of your investment to be standing upright with no other support balanced precariously on the smallest part of it? This is a recipe for disaster, I have seen dozens of times.
The best quote I saw about this was something like this, ' you go ahead and leave your case and cues free standing in the middle of the room, I'll lean mine against the wall of the $150,000 building.
Bob Johnson once gave me a good idea. He uses dog collars and small bunjee cords to attach his cases to chairs. I saw it in action, works perfectly and is secure.
The only time I want my cases standing up by themselves is when they are on display for sale, it's prettier that way.
As to the question of climate and warpage. I still stand behind my statement that in all the years of using Instrokes I constantly left them in the car in all climates and seasons and experienced no warpage. At least NO warpage that I would not have attributed to the cue construction as opposed to the enviroment. None of my Scruggs, Schons, Oliviers or other high end cues ever warped on me while being carried in Instrokes, and most of the production cues I use have survived just fine. And they almost always lay flat in the car.
John