Thank you! I think this works a lot better than trying to have them share Potions, which Harry only really knows about because of the Prince's book.

As I have Snape think in the next chapter, I think that, if Harry can have inherent talent on a broom despite not having flown before, it isn't impossible that he could have inherent talent in moving fast. And he has been training with the DA last year as well as this one.