Replace coaxial heli with single axial?
 

I am upgrading to a better RC helicopter very soon, so I will be left with an old crappy RC helicopter which I wont use at all. I really like single axial helicopters, so would it be possible to replace the coaxial with a single axial by extending the tail boom and making the rotors longer?

I am willing to spend a bit of money on this.

Thanks

Afford