Finally, i managed to snap some photos on how to tune-up your Okuma Cavalla 50w drag.
Before you do any change to this reel you need to call Okuma at (909)-923-2828 (ext 2) to order one belleville (everything cost under $5), but NOT from Okuma Cavalla 50w, instead order one bellevilles from Okuma Solterra SLR-15CS part number 16090013 named in the schematics as "SPRING WASHER". Weird? Yeah, that's what i thought at first.
Here is how this belleville looks like:
1

2

3

After you have this part ordered, you'll need to make another change to this reel.
Take the reel apart as shown in this topic, till you get to this steep:

There you'll gonna see the 2 bellevilles that comes originally set as such "
()". Change that from "
()" to "
((". When you do that change, make sure that the 2 bellevilles when are set as: left side [bearing] "
((" retainer right side.
When that changed was done, install all the parts back till you get to this part:

Take the Okuma Solterra SLR-15cs belleville and the Okuma Cavalla 50w Adjust Block as such:

and mount the Okuma Solterra SLR-15cs belleville INSIDE the Okuma Cavalla 50w Adjust Block as such:

After that, install both parts back in the Level Drag as seen bellow:

From here install back the Cast Control Cap with the spring as shown here:



With all these changes, the drag will increase with ~20lb at full generating around 50lb drag at full spool without
loosing freespool.
Anything over 30lb of drag pressure will require to use a belt with a harness, otherwise you'll be in pain - fast!
I would like to hear some feedback from anyone trying this.
Enjoy - boghy!