captbilly wrote:How do people aim the vehicle accurately enough to get sub cm Finish Line scores?
I'm using an aperture sight with a really small hole for magnification. Last year, I just aimed down the right wheels (they were supposed to be aligned), but that didn't work so well mostly because (a) the wheels could move left and right and (b) I am pretty nearsighted and couldn't wear glasses with the goggles I use.
Then I went to a scope, and that was OK. The magnification was too high though, and actually made aiming harder. Also, it's really hard to mount rifle scopes. Even with CAD work and fabrication, it's still a pain to make a perfect Picatinny rail to mount the scope on.
So this year I just made an aperture sight. One (small) hole in the back and a point in the front. The small hole more or less compensates for my nearsightedness and lets me focus on the front sight sharply. All I have to do to aim is center the view of the hole in my vision, center the front sight in the view, and then line up the front sight with whatever I aim at. This is how it looks through the sight:
Photos of the front and rear sights:
The whole vehicle, now that I'm more or less done with construction: