Different Versions of Nittaku DO Knuckle?

says Ballin
Hi everyone,

i watched a video from adam bobrow this week.
This one to be precise:
https://www.youtube.com/watch?v=UGrxhRU8CvY
At 2:37 Hitomi Sato shows her racket. I love the look of this Goriki Wood so much :D
I watched the section a few times. The topsheet of the pimples itself looks like the Nittaku ones.
But then there is this very thick looking colorful orange Sponge.
Is this the usual sponge color or am I mistaken, that DO Knuckle has a white/beige colored sponge?
Not that it would matter for my inverted backhand style but such things bug me lol.

MfG / kind regards

Tobi
 
says Ballin
Oh, thank you.
I did not know there was a large ball version. From what I can tell the DO Knuckle 44 has a 20 degree sponge. From all Data I collected...

-The orange sponge is thicker than the 0.7 available on the DO Knuckle 44
-The topsheet in most closer range footage looks like the original DO Knuckle. There is no "Crown" or 44.

... I wanna assume that Sato and Hashimoto are using custom Versions of the DO-Knuckle with the orange Sponge ( probably 20° Hardness).
Thanks for helping me in my research :D

Does anyone know how these 44-Versions differ from the original Rubber versions?
 
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