Kobayan,
Well, thank you for reminding me the method. I did that way for my small EZ topline 50. I used antenna tube for this purpose.

Bla Bla
I agree.
Still, I am using the bellcrank to make it easier to maintain for my case and didn't want to take any chance of slop. My fuselage is about 2.5" wide where the elevator pushrod exit if I use Y-pushrod. I also have no way to add physical supports for the pushrod since the kit was an ARC.

Also, for those who are using MK Bellcrank.
I have a question. Kinda hard to explain with words, but here goes.

Do you screw the body of the bellcrank parallel to the fuse or perpendicular to the thrust line?

I mounted the MK Bellcrank parallel and used small washers on the rear holes where the screws go in. Looking at from side of fuse. Top of the picture.

From the top or bottom of the fuse: Bottom of the picture
since the fuselage is tapered, when I tightened those four small screws, the actual out side arms of bellcrank was not perpendicular to the thrust line. It actually was about 30 ~ 45 degrees to rear or front (I just don't remember).

Without the washers, my elevator servo buzzed all day because of the binding? it caused. Now there is none.