As I see in my prior listing the HW-7,8,9 fell after the chassis.The 7,8,9 is for the modification book only.The chassi is for the SB 301 only. Jim. Listserver Subscription:listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'" Listserver Submissions: heath at listserv.tempe.gov Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"