Strictly the pedals aren't designed for pins but the design of the raised bumps they have makes it is very easy to drill holes to take pins. A hand drill, 8 to 10 pins per side = 32 to 40 pins total, some Loctite, a socket-end driver, and you're in business.
Yeah I can't seem to find anything that impresses me and I might as well stick with my Bigfoot pedals and not worry about the fold... but I suppose I can use the default pedals on the Downtube to attempt a DIY experiment, thanks for the idea.