The 1972 Enerjet Aero Dart used the same molded plastic cone as the Enerjet Athena and later Orion used. Not sure any other kits used that ST-20 size cone. I use the Semroc Balsa version on both my Enerjet Aero Dart clones. My built Athena uses the Moldin' Oldies cone with the panel lines for 'accuracy' to original. My unbuilt Athena SLS 'kit' from a certain special individual that I got years back has the balsa cone.

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !