After finally getting a real good chance to look it over, I believe the bobbin holder I have is a Tiemco. The little rubber grip lasted about a week before I got tired of sliding it back down over the junction. Even Goop wouldn't hold it in place.
I like the tool, but when I tie flies less than about size 16, I have to swap to my griffin metal tube to reach up in the gape. I guess if I wasn't such a cheep SOB, I could probably find one with a smaller OD tip.
Until I start feeling rich, I'll just keep doin' what I'm doin'.

Kirk