Are you refering to item#15 elfh1217, if so I saw that
when I changed to blue alum swash, head, and lower
head. It was very tight and allows no movement and
binds. The longer slot is the one you want, the other
is, my guess weight savings, or just there for looks.

I'm setup using the 2nd hole out on the horn, and
I fly outside a lot, 200 feet up and it's a blast....
no flybar weights and no clack of death yet....
I run the big motor and cf tail..with a 1250 mAh,
which I need for any wind.

One thing is important, setup your swash perfectly
and alway have straight fly bar....I straighten it
myself for while, but now no crashes no need to.

fly high, be safe! later, bud