Not to flog the topic of the firewall and various alignments to death, but the last kit I built didn't have an enclosed nose.

This is what I believe is the situation:

1. The plane of the firewall is 2.25 degrees off from being perpendicular to the fuselage centerline.

2. So that the drive shaft of the engine coincides with the fuselage centerline at the point it passes through the nose ring, the engine mount needs to be offset a measured amount to the left (looking from back to front).

3. When the nose ring is lapped into position using the kit's directions, its plane will also be 2.25 degrees away from being perpendicular to the fuselage centerline.

4. However, the fuselage centerline will pass through the center of the nose ring.

5. Thus, while the firewall, engine and mount, and nose ring are skewed 2.25 degrees away from being perpendicular with the centerline, the cowling sides are parallel to the centerline.

Have I understood this correctly?

Thank you,
Richard