[TowerTalk] Best way of getting a line over a tree

[chas]

don daso wrote:
> It's so accurate, I've even shot a line in between antenna elements with
> it.  Get one & I think you'll agree....  GL vy 73 Don K4ZA


ok, FAQs don't say, drawings and pictures don't help...
HOW do you get any accuracy out of one of those cannons?
do you mount a red dot on it or is it just a matter of trial and 
error, iow, eventually a blind hog will find an acorn type thing?

I really need to shoot a line thru a hole at about 75'
the area of that hole is about 2sqft.  I could probably get'er done 
with archery more likely than a cannon unless there is feedback 
availability so that I can say that I need to hold higher and a finger 
to the right... type thing.....??????????

thanks
chas k5dam
Houston