I have read that it does require some care to remove the balance of the co axial escapement. Same to re install. But any watchmaker who has sufficient training will be able to provide this service. As
@Archer noted you do need a level of trust with your watchmaker. To service any movement you need to have the knowledge, equipment and experience to do so correctly. If you are concerned that an Omega approved Service center will not provide adequate service, well if we can't trust them who can we trust? I don't think that being an approved Omega service provider is taken lightly by those who have worked to achieve this distinction. It takes an investment in time, training and equipment to keep the certification. An authorized independent may provide superior service, especially if it is one watchmaker completing all of the tasks. As
@Archer said, build a level of trust.
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