As a general rule, for most of us playing most things, I’d still say he’s right. Whatever you think of his playing, which I’d concede is not always great.
Absolutely he’s right. Eddie Harris stands alone.
https://usa.yamaha.com/products/musical_instruments/winds/casual_wind_instruments/venova/index.html
This is exactly what Yamaha has been doing with the Venova – however it’s more of a saxophone mouthpiece. It plays like a recorder. I have one but don’t play it much. IMO it can be a little tricky to reach the lowest notes but that’s probably just my missing skills 
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No, it’s not. See what Nano said:
And consider that again.
‘Yamaha developed a unique branched pipe structure and meandering pipe design that give the Venova a surprisingly rich saxophone-like tone and an amazingly compact size.’
A recorder is a recorder, a chalumeau is a chalumeau, a Venova is a Venova, and…
A recorder body with a clarinet mouthpiece is a recorder body with a clarinet mouthpiece!
Ehm, the Venova has the same fingering as a recorder. Of course it is a specifically designed instrument. I think it’s quite clear form the pictures that they didn’t simply put a clarinet mouthpiece on a recorder – but they did combine the fingering of a recorder with a reed-mouthpiece – so just saying – if that’s what the OP wants, he simply can buy one.
It doesn’t appear to be when he’s specifically asking about shuffling bits he’s got already. The topic is ‘Converting a recorder into a chalumeau’ and Yamaha haven’t converted a recorder into a chalumeau, so not surprising I misunderstood you.
Cleanup in progress - Mod.