Clean the preservative and grease out of the trigger, put good stuff in there like TW25 and swap the main spring for the green competition one. Cheap trigger upgrade

I had the full size and also picked up a new Centurion, both ran great and felt good in the hand , very well built . may get another .

I have a Nano in an APX Carry frame. The single-stack Carry is really the guts of a Nano with a different slide and frame: quite different from the rest of the APX line.

Pros: carries well, functions well.
Cons: long trigger pull, very harsh grip texture.