I know a few builders of the Skymaster in hotter countries have had trouble with heat causing the wings to 'droop'.
I have added a wing that now contains a run for an 8mm carbon tube through the wing. It is available to download from the Skymaster page of the website for free.
Loved the carbon tube upgrade to the wing.
But need 5mm carbon tubes for the booms,
as this is the weak spot.
Please can you look at this and upgrade the files