Whoa! Jackson, you're sharp man! I changed to a smaller bucket to make the excavator looks a bit more balanced and to scale.
Well, as for weight reduction, it does help a little but not much.
I think the reason TLG used a bigger bucket is to accommodate their B-model - Motorized tracked loader. Otherwise the tracked loader will looks wierd in a small bucket.
Agree?

PS: bobby -> you guessed it wrong

Already installed my excavator. I agree with everyone here, the main boom need ALOT of power to move it. Have not tried it using new batteries, but using my current batch of used batteries (the latest being the ones used in the exhibition in June for my Crane Truck, energizer somemore!) results in the main boom not moving at all! But the same batteries can move the rest of the arm, bucket, rotation and tracks.

Will try with fresh batteries and see how it goes. 

Yaki, can show how you use an adapter on your excavator? I am curious to see what kind of adapter you are using.

seems like the joy is gone when this problem happened....
if i'm not mistaken, this problem are the same thing happened to front end loader when using the PF...
the main bucket boom is hard to raise. when using the m motor....

Ya, now keep thinking on how to make it move faster.

Option 1: Add XL motor to main boom motor. Also add another XL motor so that when the excavator is driven both threads spin at the same speed (XL motor is slower)

Option 2: Kit-bash a 9V rechargeble add on.

Option 3: remove gearbox and have dedicated XL motor to serve main boom.

Anyone tried using rechargeble 1.2 V batteries? Any performance difference?

hi paanjang,
also need to think the force too. The XL motor sure produce the more torque compare with the M-motor. But the gear and the universal joint can accept the torque or not. 
Needs to built and test with carefully, i think the bevel gear will slip.
If you have modify it please share your comment to us.

Huah, bz for a few days so many post d.


Paanjang16 its a normal adapter with its wire connected to the +- pole of the battery box


Yeah, Tuan the adapter i got oso supply constant V but a mere 50Ah, looking for a 1000Ah now to increase the P. But errr.. technic gurus, can the M motor take the power arrr or will it burn the motors?


Paanjang16, i was oso thinking of not changing anything on the gear box, but adding additional motors at the bottom of the excavator dedicated for running the tracks. Its bcos the alternate B model the tracks are fast and able to 'drift' when taking a corner 

That's tricky. Then need to consider Power vs Weight.