I think the chap in the video should be treated with the disdain that he so deserves .
Typical American sales manure from start to finish.
Let us get one thing straight .
No need to apologise at all for being left handed , God made approximately 80% of people right handed , but he did make about 20% correctly .
Remember he made quite a few F*** Ups, he made Women.
The CORRECT name for such a gun is a 'cross over stock' popularised after WW1 when we lost many many soldiers , and many returned home with the loss of an eye. We must remember that 1911 to 1946 was possibly the greatest years of the 'Driven Game ' scene and the 'Manorial' shoot was the highlight of village life , employing and entertaining many people in the local community. Have a look at 'The Shooting Party ' a lovely nostalgic film.
Crossover stock like so many shooting inventions were very popular and did serve a purpose.
Felt recoil is a bit severe and the guns are a good talking point , if only to highlight the craft of the gunsmith.
Probably more effective and cheaper to learn to shoot off the opposite shoulder?