Thanks for the information! So you can't really know what a player plays with even if you see the name on the sheet as they can have cutom made sponge from the manufacturer? Question is then if that's common among the best players?
Your welcome.
Well, i'm not sure if all the best players, but its common in CNT
The DHS rubbers from the factory will have the players name printed on the sponge (so they don't mix it up).
It is already common (for the public) to buy DHS rubbers with different sponge versions (including the blue one and different hardness).
Normally the top sheet is the same, but just from the centre of the huge sheet, where maybe the outer sheets which can be more inconsistent, ends up as commericial versions
With Butterfly, I think the sponge is the same. But the players don't receive them in commerical packaging.
Also getting the centre piece.
But players like Timo stated he always gets the heaviest T05 available.