The only mods on this one are the KSJ paddles, Quick UK swashplate and metal washout base. It flies just noticeably better than the other one that has just the KSJ paddles. There is really nothing much that needs upgrading on them but, I like to try out new things.

Blades are about the only upgrade you should think about and only then after you get well into forward flight and are doing aerobatics. The paddles will help with roll and flip rates but make the machine not as smooth.