Suspension setup/Coilovers are a factor, me and S-L-I-X have shortened droplinks (we cut them down and re-welded), his are a tad shorter. For him they did f-all and bought the ARB hoops a bit out of alignment in terms of contact (as they did for me). But his suspension is more bouncy even at a lower height setting so he still catches the ARB. In my case my coilovers are a lot stiffer and for the suspension to bounce enough for the driveshaft to hit the ARB is a lot harder as more force is required (plus I'm a tad higher).
Either get aftermarket droplinks shorten them a tad or leave them (ideally you need to have the arb disconnected to see whats better a shorter or longer link as then you can also see how the hoop effects it as the droplinks in place), afterwards raise your car accordingly to reduce ARB and driveshaft contact (mine is a nice height and I never knock anymore).
Otherwise get a new ARB, the R32 or TT ARB is meant to be a good choice.
But as advised at stock height the wishbones are horizontal which is ideal for handling.