The MicroHeli tail gearbox for the 3D Pro has a flange inside against which fits the tailshaft bearing.

This has to be removed with an 8mm drill preferably in a drill press to allow the tailbelt to pass through.

To make certain the tailbelt deosnt rub against the gearbox casing I used a small flat needle fail to trim away the walls of the gearbox at the top and bottom.

Once fitted the tail gearbox, 10 tooth belt drive pinion and shaft makes a nice strong but lightweight unit.

I made horizontal and vertical fins to my own design in 1.5mm carbon.

The vertical fin has two 3mm dia 5mm long spacers to mount in the original location on the Microheli tail gearbox.

The horizontal fin uses a duzi tail fin mount

I have used the alloy upgrade tail blade grips.

The tail blades are 5mm larger than standard from a shogun helicopter.

As a tailbelt drive is in use it is important to have a good tail support system as this can be used to track the belt correctly on the front pulley.

I used a set from the TRex helicopter mounting them to the undercarriage at the front and to a Duzi tail support mount at the rear.

The finished tail is considerably longer than the standard 3D Pro yet lighter and stronger.