Glad to hear it worked!
In my experience, I try to leave the two alone as much as I can. If I see them out around their den, I try to stay away from the tank if possible, and move a little slower if I can since they are easily scared. While the goby is out, however, I've seen him come ~6" from his home to get food that floats by in the column. Most of the time, mine will come out right after I feed the tank and get whatever Mysis, Brine, etc. floats by the burrow. They tend to burrow a few different places, and only a few of them seem to get the most food that floats by, so that tends to be where I see them the most. Another thing to do is get some Formula 1 small pellet and put it right in front of the burrow, or actually in the burrow if its open but the goby and shrimp are inside. I would only do this though if you're sure they're not getting enough food, because eventually, they will come to expect that as their only means of getting food.
Hope that helps a bit bro.