How to Assemble Legendairy Milk's Silicone Collection Cups

Are the amount markings accurate with it assembled or when dissembled?

Do the 15mm inserts go in the 28mm or 24mm flange?
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Legendairy Milk replied:
The 15mm inserts work best in the 24mm flanges.

Why do the adapters A that came with my cups not fit as snug as the ones in this video? Mine stand out about a quarter inch…
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Legendairy Milk replied:
Happy to help! The adapter A pieces are not uniform in length so it may be a bit longer than the adapter seen in the video! This shouldn’t impact the use of the adapter or the ability for it to create suction!