Niji No Sora Intro tab by FLOW

This tab is incomplete, obviously, and was created by listening to https://www.youtube.com/watch?v=outx6ZPOP8U.
I just haven't gotten around to figuring out the main bulk of the song.
I intend to tab out the rest as soon as I can. Any comments would be very helpful and
very much welcomed.

Section 1:

E|-------------------------------------|
B|--7h8--10----------------------------|
G|--------------7--9--6--7-------------|
D|----------------------------7--5--4--|
A|-------------------------------------|
D|-------------------------------------|

Section 2:

E|--------------------------------------------------------|
B|--------------------------------------------------------|
G|--------------------------------------------------------|
D|--9--7--9--7--9--7--9p7--------9-9--7--9--7--9--7--9p7--|
A|--9--7--9--7--9--7--9p7--------9-9--7--9--7--9--7--9p7--|
D|--9--7--9--7--9--7--9p7--------9-9--7--9--7--9--7--9p7--|

Section 3. A:

E|-------------------------------------------------------------------------------------|
B|-------------------------------------------------------------------------------------|
G|-------------------------------------------------------------------------------------|
D|------7--9--7-------7--9--7-------7--9--7-------7--9--7-------7--9--7-------7--9--7--|
A|--9-9-----------9-9-----------9-9-----------9-9-----------9-9-----------9-9----------|
D|-------------------------------------------------------------------------------------|

Section 3. B: (Play straight after 3. A, <7> means natural harmonic at the 7th fret)

E|-------------------|
B|--------<7>--------|
G|-----<7>---<7>-----|
D|--<7>-------- <7>--|
A|-------------------|