The person from Finland on the other forum has 14 posts. Why does this have any credibility?
I mean, you can't even get a bezel change on a particular model, having a different caliber would be even less likely. Putting the in-house hairspring in an older caliber I can see. The half a millimeter larger size of the 3186 though, when inside a case, makes a difference.
Seriously, if this was true it would be documented.
