a thing I just noticed on rereading -- part of the wallpaper in Dave's dream room kind of looks like the Rage symbol (seen on page 1704). do you suppose this is an intentional thing done by Gamzee alongside the placement of Cal?

Not sure- With an intricate background like that, I have a feeling Hussie may have googled ‘wallpaper patterns’ and gone from there. Seems a bit of a superfluous coincidence. But then again who knows what goes through that madman’s mind when making these panels.