They're brifters, probably Sora. (yep! I looked it up.)

So you just stick something adequate down in there, without securing it or anything? hmmm...

I have some felt thingies somewhere. I'm sure I can find something suitable at the hardware store if I can't find those.

edit: oh, on re-read I see you were using the adhesive to keep them in. Okey dokey.

Thanks!
Karen