A mayfly doesn't have a digestive system, it doesn't live long enough to need it. My very first attempt at LST diffs in the Revo looked exactly like what you did. And I thought that way too much material was removed from the bulks so I tinkered with the project and after going through several bulkheads bought on ebay, I finally went with shaving material off the LST diff cases instead of the bulkheads. Very little material has to be removed from the bulkheads with this way of doing. Yes the Ofna center diff output drives are longer than the losi ones but only by half a millimeter. It might still help.
I also made what I call
diff blocks so sandwich the diffs in place inside the bulkheads. They are awsome and if done correctly, the diffs don't move at all.
My LST XXL diffs in the Revo bulkheads.
Again, this all started with Linc's idea.