Advice about converting a beer keg to a fermentor

[Ciderhead]

Slight mod with bungees to get it to pass pressurised water test






And a second one




Finally, easy to clean visible fermentation vessels, now just to lift it with 40-45 litres inside of it!




Sent from my divining rod v2.0

[Ciderhead]

its acrylic 6mm sheet pushed down onto the tubing.
I was thinking of using an acrylic bead but I couldn't think of a way of getting uniform height all the way around to get a good airtight seal.