Sure could use some guidance on the color sensor; is the HiTechnic color sensor allowed? I thought I was buying the correct sensor but it says HiTechnic and my understanding is that only pure Lego sensors are allowed. Randy Greene Richmond Eaglebots Richmond NSBE-BDPA Bots -- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". -- VADCFLL administrative announcements are sent via VADCFLL-ANNOUNCEMENTS-L. Visit https://listserv.jmu.edu/archives/vadcfll-ANNOUNCEMENTS-l.html to subscribe.