Osie
The directions are a little vague cause the roads there are somewhat tricky, so I'm gonna try and give it a go.
Take the R28 towards Krugersdorp, go past Centurion, Diepstoot I mean Diepsloot, the Highway will go into a dip through a turn towards the left, the off-ramp you should take is called the Muldersdrift off ramp. Now turn left at the first crossing you get and travel underneath the highway it'll turn towards the left again, at the T - junction turn right. At the Next T - junction turn left and the frist road right again, the Estate should be on your left no very far from your last turn.
The tricky part of the Road is the part from the off-ramp to the frist T junction, then its straight forward, did a bike run past there once some years ago but never went to the estate itself.