It has been a few weeks with the new diaphrams in. It does sound cleaner, maybe a little brighter too. but not harsh. I found fluid spaltters on the inside of one of the old diaphrams. I carefully cleaned the voice coil groove in the magnet. (I did not spill any fluid. And what is that stuff? It is a brown colored oil.) then reassembled the drivers. Was very easy. Two tools use where a #2 Phillips and a 1/4" open end wrench.