After reading the all thread, I have compiled this list of errata building from the plan, hope this helps other also.
- Head support brackets (Tongues) Birch Ply wood preferred over Lite Ply
- Left/Pitch servo lower by ~5mm, mounting lugs too close to Lower Mast Support
- Hatch Base H3: 20mm too long, side view is correct
- Pivot head hole 15mm from the top instead of 20mm, side view is correct
- Under Carriage aluminum drill hole 30mm from center, 35mm on the plan is incorrect
- Engine right trust 2 degrees not mentioned on the plan
- On the side view, the labelling of LMS1 and UMS2 are reversed