yes, I use it, the one for the diff in the Asso brand. but what interests me, and my translator does not know interpret, this is the second part of the answer
<< Just sand down the diff plates by using some 1000 and 1200 sand paper and use some 3mm ceramic diff balls and a one-piece thrust bearing instead of the regular 1150 ball bearing that's located in the diff outdrive. This will make your diff very smooth
All this is used with a alu F104 diff >>