How many different Bravo one lower gear cases are there ? As far as swapping gears from one to another . I think the early versions used shims for the carrier and later used the load ring ? Are there a lot of variations ? This would be a Scenario were somebody would be swapping gears from a corroded case to a good case . Thanks in advance for any input .

Look online under history of the bravo there is a manual that has been downloaded that is very in-depth of the differences and it also shows a diagram of what lowers can be used with what uppers
which I have put an old upper with a newer lower and have no issues
I have it saved in my email if you can’t find it. the website is motif or motiv

where I can find it I am interested in seeing it thank you

Here is the link http://www.motooff.ru/assets/files/d...formatsiya.pdf