No worries.
Make sure your pathways to your headings are as clear as possible when selecting your mounting location
If you have foliage towards magnetic 100, upgrade to a HBU22 or HBU33. The HBU11 is great as long as it is line of sight. If it doesn't have that, upgrade.
I have the HBU11's competitor in the ANT751. Thirty degrees of axis and it does fine with my local ABC affiliate on RF 13.