When to signal, or not to...

[ctblu40]

There are a couple of situations that do not need a mechanic or a verbal.
An obvious catch of a batted ball in flight, a foul ball batted directly back to the screen (or into the parking lot).

As far as the pull the string thing, if it is strike 3 looking, I'm ringin it up and selling it big. Most coaches teach to protect the plate with 2 strikes, if I don't sell this one, I think it leaves room for someone to think/say that I wasn't confident in my judgement.

Uncle George,
From your post it seems like you don't like to sell the close calls

When in the field, on a close play I may voice the call a little louder.

but on routine plays you still use mechanics

Fly balls (my responsibility), a simple visual out call or safe call on a no catch/trap of ball.

I find this system very curious.