Mandy, did you ever look into what your and H's LLs are?
On the persistent presence, considering how much time you spend over there, I do understand that you do not want to push anything more.
That is why I'm wondering if you are catering to his LL.
Good that he is looking into co-d. What ever you can do in supporting his findings and any work he may decide he wants to do in that end, would likely be helpful. Just let him do the work and validate... you know the drill...