No, I don't service these. When someone asks me to service one, I typically suggest that they send it directly to Omega. Omega will swap in a freshly serviced complete movement (base movement and chronograph module) and then send the movement they remove back to Bienne to be refurbished - that's the procedure here in Canada anyway, and I can't see why it would be different anywhere else.
As you noted, it's not just me - here is a quote from another watchmaker on another forum who answered a question about servicing these recently:
"The service is a movement exchange generally, the DD modules are a pain to work on and it's next to impossible to get parts so finding someone to perform an actual service is tricky. They work quite well until they don't, as a watchmaker I wouldn't own one and despise working on them."
Pretty much sums up my feelings. Even
@Canuck who is arguably one of biggest defenders/fans of the reduced model here, and is a watchmaker also, doesn't work on them from what I have gathered and said his didn't work well until he sent it to the service center for a movement exchange. I'm sure there are watchmakers out there who service these, but when I have so much work I turn down several people a day, why would I take in work that I know is going to be a pain in the arse? It's not about skills or abilities, but access to parts and making a business decision.
The OP should send it back for a return - although he's been told this countless times, been told not to contact the seller, he seems determined to make a mess of this return process. I wish him luck!
Cheers, Al