After reading about someone elses experience converting their shuttle from .30 size nitro to electric I decided that I had to try the same. I have an old Shuttle ZX that I tried flying several times about 6 or 7 years ago. I did not do too much damage to it and up till now it has been just sitting there taking up space. The conversion is fairly easy. Just take the nitro engine out along with fuel tank and any other items required to run the nitro engine. In my case I also took the frames apart to check the condition and clean the heli up the best that I could. I bought a mount that is designed to mount the electric motor so the output shaft is in the same location as the nitro engine's output shaft was. You even keep the clutch system. The list of parts That I used are:

Hacker c50-19xl motor. I got one on sale for $250
Hacker Master 77-O-Heli. ebay for $193
Hacker prog box. used, online for #35
Conversion motor mount. online $50
8 TP2100 batteries. Bishop Power Products $520 plus tax (az resident) For now I am only using 6 of them in 6s3p
3 feet of 14g wire for the battery wire harness
approx 10 male and female deans ultra connectors on the wire harness/batteries and speed controller
Hitec Electron 6 rx
Futaba GY-401 gyro
JR 1400mah nicad receiver battery 5 cell. (no bec in the system)
receiver on/off switch with y-connector for esc signal wire.
Two JR ferrite rings to reduce rf noise. one on the y-connector near the receiver and one on the esc wire near the y-connector
Deans antenna.
Futaba S-148 servo's. what we had in it when we started flying it years ago...
using a JR 8103a transmitter.

I tried flying it for the first time a couple of days ago. I did not notice that the swash plate was seperating before trying it. That caused some very strange things to happen but luckily it survived. After fixing the swashplate problem we tried it again and it did much better. We did get radio glitches and were forced to set it down to work them out. I relocated the receiver and added ferrite rings plus I swapped the full length antenna for a deans mounted to the left rear gear support. Today I changed the esc from normal throttle to governer mode and it was flying great! The rotor rpm was set to approx 1600 under load. Any more rpm than that and the heli started to make more noise from a high freq vibration. here are some pics of the heli. Hopefully I can get a video of it flying soon. approx. cost was $1200 not including the helicopter, tx, rx, servo's and gyro. YIKES! [X(]