Does anyone knows the wheigts of the rubber (uncut) and is it suitable for both sides ?
75g with 4 very thin layers of glue, 54g cut to my blade (159x150, the miracle from Sergio), the 2.1 thickness. (I did a bad job, had to remove).
It is not suitable for both sides, imo, but that will depend obviously on the player's preference. The sponge has typical chinese dense sponge feeling, very nice. It differs from the "hybridy" sponges... I've only played once yesterday, so writing prematurely. I must say I like it a lot. Coming from STN, to describe what I feel is simply: RELIEF ;-) It's a bit more dynamic (well, will see how it evaporates later), a bit higher arc, much more easily accessible in slower shots, and in hard shot I also don't feel like bottoming the sponge. More spin too, partner didn't block some shots, with STN he hardly missed.
The sponge, measured with Type O durometer, is 50-51. This seems slightly less than declared, e.g. the Rxton 9 40,5 I measure as 54. The STN H40 I also measure at cca 50 (maybe the booster is not evaporated fully). Anyway, the sponge doesn't feel too soft, no way, I really don't bottom it and people using ESN still describe it as dull. For me kind of optimal hardness.
The thing is, opinions will differ based on where are you coming from. If you are coming from chinese dense sponge like rubbers (H3, B2, STN, Rxton9, DFVP) you'll like it. If you are coming from ESN/Hybrid it's possible you may not like it. E.g. a friend of mine, playing RZ EH obviously enjoys that rubber more... Cheers.