HIPS is a great material (*) and the original black/white/grey were pretty boring, the new red/green/blue/yellow make it much more likely that I'll be using it for more projects.
That said, feel free to add more colors!
(*) Takes a little getting used to, for instance the bed adhesion is much lower than Z-Ultrax, but cleaning with acetone and maybe a dot of Ultrax on the rag (to make the lightest slurry) pretty much makes that a non-issue.
Anyway, thanks for the new colors!