This is a great little model, all parts come in seperate bags, and once you get the model running, its a lovely little piece from Airfix.
However, there is a small bit of wiring needed, but no special tools required other than a hair dryer, be very careful when assembling the electrics, as the soldered joints are flimsey, and i ended up re-soldering two joints.
The engine goes together well,but take some time adjusting the air blower nozzle to give you the correct angle for the air to hit the inlet fan, this is easily done.
To get the engine turning, you may have to lightly sand the inlet fan edges, to prevent it catching on the engine casing.
Overall a lovely kit, if i were airfix i would add push fit connectors, for a little extra cost, and make the wiring diagram more clear.