OK, so lets run through the tail build. The tail shaft bearings must be R48 loctited in place, so again caution required.
Apart from this it's a fairly simple case of just screwing the two halves of the gearbox together.
Below left the bearings loctited in place. Bottom right the belt drive gear in place.

Next job was bolting the housing around the boom with belt inserted.
The belt should only have a 90 degree twist which can be difficult to see later in assembly.
As a tip I tape my belt in place so that it can't rotate beyond the 90 degrees, I remove the tape just before
installing onto the tail drive gear in the main frames.