apropos of nobody in particular.
Staccato can be acheieved by the use of finger attack on the English AND WRIST ATTACK ON THE BELLOWS I do this by giving an , extra push or pull in the direction I am already going, rather than reversing the bellows, similiar to a fiddle player doing a broken slur.
Finger attack can be used on any system of concertina , but tends to be overlooked by Anglos, because they have an inherently more rhythmical system [in out]to start with, but may be useful in more difficult keys[ b flat] where your scale may be going more smoothly.
A very good exercise for beginners on all systems[ and for anglo players in keys that require cross rowing] is to play scales as staccato as possible[ wuith finger attack] and as legato as possible.
Dick Miles