I am loving this thread. Thank you qaz.
For those of you in Perth, cheap tickets to the good food and wine show.
https://www.ozbargain.com.au/node/786267
Nicks has a one day special (10% off for all ployez) with coupon code Champagne
Brings it to $58.49.
https://www.nicks.com.au/products/ployez-jacquemart-extra-quality-brut-champagne
I am not across these things but my feeling is diam 2 is a low quality cork. Could it be recently bottled?
https://vinocor.com.au/diam/#:~:text=DIAM%20for%20still%20wine,latest%20addition%20to%20our%20range.