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@tbc
I found a Zipp valve adaptor which seems to be the shallowest possible.
I'm still having trouble getting the adaptor off without losing all the air again, there's just no room to play with in the valve hole.
The tyre's not taped on yet so I can lift tje tyre off to get the adaptor off, but obviously that's not going to work once I've taped it.
Any suggestions from previous Ambrosio owners?