I haven't upgrade anything on mine!!! Only the 8T Motor and CF Blades!!!

The thing on the blades are just orange Tape the one used to patch the covering on planes!!! I wanted something to be able to see the blades spinning,,, when I had the Wooden Blade I used sharpy with collors,,, but on the Black CF Baldes that's the only thing to use you can see just make sure you use same abount on each blade to keep it balanced!!!