ETA 2892-A2 Automatic Works - what else can I do?

Hi all I just recently finished servicing two Omega Speedmaster Reduced (equipped with the ETA 2892-A2 coupled with chrono module Dubois Dépraz 2020) for a couple of friends and both watches are having the same issue. I'm an amateur and just service watches for family and friends. The automatic work is not fully winding the movement and both watches are stopping after 6 days of use. Very curious that the two watches are showing exactly the same behavior!! I have tried everything a

The watch companies are interesting ideally they would like you to replace the entire barrel. So for eta no mention of mainspring lubrication at all. Omega is suggesting for the 1140 the mainspring is different then the eta 2892-A2. The tech guide for the 3220 which I'm attaching gives a different newer number. Then with this number according to bestfit It will work in all those other watches none of which are a eta. so there doesn't appear to be a cross reference listing between Omega and