F462 is the part that covers the upper rear of the baggage compartment. It has a round top that fits over the inner flange of the fuse bulkhead that is one aft of the rear seat back. The plans are very vague on how to attach it to the bulkhead. On its lower edge there are fasteners to attach it to the rear of the baggage bay (on my project that I bought partially completed), which is removable to access the elevator bellcrank. But at the top I don't see anything and there is not much overlap to allow a fastener to screw it to the bulkhead. I might have to make a bracket of some kind. What has been done on the other 1000+ rv-4s?