Alison reminded me last night that my spacious chassis didn't have a heat capacitance on it. Because of that, I began to fool around with more artwork. I first added the heat symbol (which might need to be bigger to look good), and then made it a creamsicle pink to try to indicate that it is a passive heat capacitance instead of an active heating.
I am starting to think that passive things like provided space and heat capacitance should be in a light color, and active things like adding heat or reducing space should be dark. I wonder if a blue fire symbol might reasonably indicate that the card reduces heat.
The only real worry that I have is that colorblind individuals might not be able to correctly parse that.
Either way, with the pink fire symbol, I decided that an orange creamsicle provided space symbol was needed as well and I updated the space symbol accordingly.
Since I have been making so many text layers look sort of fancy, last night I made a Gimp script to do it for me (basically you select a text layer and run the script and it makes it look like all of my text looks like on the card). The script can be found here.