Daniel, you will be much better off getting the HH gyro instead of aluminum upgrades, especially if your heli head is smooth. You can always get aluminum ungrades later if u wanna. cltmte is correct, if u wanna do a usefull mod, do the twin tailmotor mod, that mod is almost a must, if for example u have only 1 tailmotor and it goes out, your heli will crash. 2 tailmotors will definately decrease that chance of crashing. I'm not a big fan of HH gyro's, but it will make heli more easier to fly, it will also shorten the life of a single tailmotor, thats another good reason for twin tailmotor mod.

Regards,

Corey