I think that there is a big miss understanding here, we did not work on those earring we are working on a different item , that has the same system.
So if the tool work for the item we are testing it will for all items with same concept.
I would like to add also that what I am working on is not the inch part but it is the lock system.
As reported in DFMQ main problem was that after just few cycles the lock wasn’t locking anymore, so that is the reason we try to implement the lock.
If now the problem we have is also on the inch the as solution we may have only to increase the thickness and that it may compromise the design