How did the OLB vowels sound?

personified grammar, c.1540

Reconstruction of how the 'Fryas' vowels may have sounded, based on related modern languages.
(Fryskednis blog-posts of 2018, April 17 to 28.)

1. the single V
2. the double V or W
3. A, Á, À
4. O, Ô and ʘ
5. U varieties
6. I, J, Y and Í
7. E and É