just bought the syntace stratos..
 

i'm running cross levers so i don't need the holes. you guys put anything on them like some sort of filler before the tape? or just go ahead and tape?

I don't have the Stratos, but I have another set of bullhorns with through-bar cable routing, I didn't bother to fill it or put anything over the holes. Just went straight to barwrap.

just tape away, you won't even feel 'em (unless you are using a cloth tape or something without any padding)