I got Master Wu's Dragon (70734) a while back. It's a cool set but there were a few aspects of the dragon that I felt could do with tweaking so I modded it as follows:

• reconfigured the neck block to increase the angle of articulation (not easy to see in the picture)
  
• removed the clip and flagpole assembly from the dragon's back
  
• made the tail more substantial by doubling it and changed the finials to katanas.
  

I also altered the ghosts/spirit warriors:

I'm into fantastic, mythological and historical LEGO generally and, as you may have guessed, not a devotee of the Ninjago story-line set out by TLG. Apologies to any Ninjagoers who were expecting canonical representations.

Don't worry, I'm a dedicated fan of the Ninjago TV series and there's nothing about these changes that seems like it'd offend fans of the show.

However, I do think doubling the tail feels a bit awkward. I think one thicker tail would have looked better than two thin ones.

Cool MOD!

the figs

I modded this dragon by rotating to the upper side ball-joints that attach legs to body. This way legs became longer :)

The ail does look a bit strange... But otherwise, pretty show accurate other than the possessed ghost (??). The dragon in the show also does not feature flags.

Those are some nice modifications it would be really cool you tried some on the Morro Dragon