Is the glottal stop (represented by the two, consecutive T's) -always- the way you pronounce two T's in the middle of a word? I noticed that earlier -- with "gutten," I believe, but up until now, I've been pronouncing the sound as an aspirated T.
It doesn't sound like a glottal stop to me- it sounds like a voiceless T.
I think that's the term- the T is pronounced without leaving the palate, as in German Schatten and the like. I've been keeping my tongue on my palate for the switch between T and N, just like I do with German.
Hopefully a native speaker can help.