Seems like a typo - Cut/Paste error in the instruction manual.

The point/para 5 seems to be a mix of the Wing + Stab installation instructions ;-)

Elevators are fixed using the 1/2" tube + 2 screws per side. If you are gonna be removing them all the time, then use Teflon tape etc instead Loctite ( to avoid messing up the blind nuts etc). Look at Page 14 for details

The Wing is attached using 1 4mm bolt & drilling the rear Anti-rotation dowels with pins thru them is recommended as a backup. Page 22

Hope this helps.

--Arvind