Was just ordering some stuff from Pinball Life while watching my pseudo-Alma Mater, the Mighty Oregon Ducks, beat Krezchuweevaskevskey's (not even going to attempt to spell it) Duke Blue Devils to advance to the Elite Eight.
Anyway, for you MET Premium/LE owners, Pinball Life has a new item out, the "Stern Newton Ball Assembly", which I think is the same assembly used in the MET Pro and other pins.
Product ID : 535-9522-00_535-9523-00
It replaces the Newton cube under the hammer for MET Premium's/LE's.
I had already replaced my MET Premium Newton cube with the previous stand-alone Newton ball (sans "assembly", 1 mounting bolt), but I think the assembly will work better as it has 3 playfield mounting points (bolts).
Considering the physics involved, the force of a high-speed pinball hitting the Newton ball assembly will be absorbed much better and result in less stress for an assembly with 3 mounting points.
Was kind of concerned when I first installed the 1-bolt Newton ball, as over time and many hundreds of hits it might start to loosen/move and chew into the playfield wood to create a larger hole.
(Sir Isaac is my hero).