Bohemian, it seems like you hold your accordion like Sharon Shannon, is that correct? You see this approach very often with Irish players.
I have a two row Castagnari and tried it too (for Irish trad), but never really got the hang of it. Maybe my left arm is too short.
Yes, OMG yes I play like Sharron Shannon..
Gag me...
NO.
Sharon Shannnon uses a huge bit of foam on the bass side. plays stepped keyboards, and has talent and skill I will never have.
She plays like no one.
However, I do play like 90% of the Irish players as to position.
Lock the box.
As one very famous Irish B/C player now living in America says..
Get a shot glass of whiskey, put it on the top of the box and play without spilling a drop.
I never play standing up.
I sit and lock the box. One last thing to worry about.