Which preposition to use with crackerjacks

at Occurrences 1%

But he was over in France and the only other fellow in our troop who is a crackerjack at tracking, is Westy Martin.

in Occurrences 1%

A fast yacht is a handy vessel south of the line, and some queer tales were told about the boat that had once shown her heels to the crackerjacks in the Solent.

of Occurrences 1%

Now it happens that I'm going to put a press in my new business and I'm looking for a first-class crackerjack of a pressman.

on Occurrences 1%

They're a lot of crackerjacks on signalling, I'll say that much for them.

Which preposition to use with  crackerjacks