I just saw the Airframes is working on an STC approved aluminum strut for PA 22/20. This might work for certified Super Pacers. If Airframes sells the aluminum strut and STC to a PA 22/20 owner the mechanic could combine the SP STC and Airframes STC and use aluminum struts for their certified Super Pacer. Airframes would have to leave the aluminum strut long so it cut be cut to size for the SP.