Thanks, got the mail. After a quick glance at it I'm not betting on having an easy time breaking out, since you're basing on the sandboxing primitives built in

Thanks, got the mail. After a quick glance at it I'm not betting on having an easy time breaking out, since you're basing on the sandboxing primitives built into mzscheme and aren't abusing them in any way that jumps out at me immediately. But I'll look at it more later.