what I see here is a co-axial heli with 2 Brushed motor.... if I were you I will not extend the play time as brushmotor overheat very fast... you can get higher battery pack (MAh) but you will burnout thse brush motor and mind you each motor cos RM30.00

you may consider brushless mod which will extend your motor... but it is costly... and since yours is a 3 channel co-axial heli... and you'll probaly learn nothing... I will advise you not to do any mod to it...

Play with it till it dies and consider upgrade to a Fixed-pitch heli or a Collective pitch and further your skill...

a 4 channel fixed pitch is very interesting.... and alot to learn from co-axial 3ch heli...

so my advise... dont upgrade, maybee get some spares like blades and main gears... but dont invest anything further...it's just not worth it...

just me 2 cent

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Added on March 17, 2011, 12:23 amoh... for wind resistant on Taylor lakeside campus... I've just been there

my advise,,, any size smaller than 600 you can forget it!!! and must be CP heli... even 600 have a hard time hover there... the wind is strong... and my advise dont fly there it is suicide...

furthermore flying heli expecially Collective pitch you need a big empty area and dont fly when people around.. they may end up at hospital or DEAD... the heli blade can easily take a person head off!!!

so please consider it... play in college when it is totally safe... and dont fly where strong wind... it will knock the heli out of control even big heli can get out of control and hit some one or you...

you may consider closed area like big hall...