一点感想：/t/ /d/ /l/ + /r/ sound

Usually, for the sounds of /t/ /d/ /l/, the tip of the tongue is putting behind the top teeth. However, the tip of the tongue moves up when /t/ /d/ /l/ is followed by /r/ sound, which make it easier to pronounce the /r/ sound:

that is to say: the sound /t/ /d/ /l/ etc. needs to be pronounced with the tip of tougne in hard palate (in the hard bump, not just behind the teeth) so that to be easier to pronounce the /r/ sound which immediately follows.
For example: stored.

This is only my personal observation and thinking, your comments are mostly welcome.