Weight issues from my critique point.
The third shaft is the output shaft and is geared down from the second shaft's spur gear by what seams 1:2 maybe 1:3. There isn't a whole lot of reduction and a lot of weight. Possibly eliminating the third shaft and making the second shaft longer to attach a sprocket... but then that wouldn't work because the shaft moves and the sprocket would need o be mobile. SO maybe if you made the first shaft move with a spur gear straight from the CIM the one of the 2 gears on the first shaft. That would make the first shaft mobile and you could then attach a sprocket to the immobile (laterally, not rotationally) second shaft. In essence that would reduce the size of the big middle spur gear originally on shaft 2 and the gear it connected with on shaft 3 would no longer be necessary.
Its kind of a radical change, but just an idea of other possible means to reduce weight.
Also, the hubs on the gears can be reduced. a lot. They are pretty huge massive in the pic. a simple trip to the "digital lathe" could fix that.
my $.02
Good luck with version 1.2 Arefin.
Then there's the electronics, pneumatics, and all that stuff on top that will magically make the ball score billions of points. That will add up to a lot of weight. - MrForbes [more] 
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