I just got an e-mail from Bob Zecca at Team DI. Apparently they have open-face Zamp helmets, SA2010, for under $150. (You do NOT want to know what I paid for my Arai!) Click here. This is not a plug of Zamp or Team DI, it is merely a public service in case there's anybody else out there who hates spending big bucks for a helmet I use half a dozen times a year. I'll try to post this elsewhere, too.
