John, if yours is "legacy" and Roger's is newer, the threads will probably be different, so the threads in the black plastic insert won't match your finial threads.
The black ti is the worst of the junior series--nothing matches anything else, any more.
Good to know Ed. Thank you! I have parts bags that I use once in a while. I'll be sure to try the threads before I assume they work and assemble. Roger this one came from a set I bought a few years ago. I'm still willing to send it if you think it might work or want to give it a try.
I just went through my parts bag and found one. ( new in manufactured baggie).
PM me your mailing address and I'll get it out in the mail to you.