After being grounded for 100 days I finally received and installed a new aft bulkhead on my Hartzell Q-tip M20J....I scoured all sources for a spare new or used backplate to no avail and in the end Hartzell had to make a new one....thanks very much to Russell Stallings at SWTA for maintaining the pressure on Mooney and Hartzell.... In installed a Skytec 149NLec and a Concorde RG24-15 at the same time and then went immediately into the annual....so finally I am airborne with a fresh annual!! :-))