I've already started taking it all apart and putting the hardware and requisite screws into ziplock bags in preparation for doing the woodwork, but I'll do some pictures when it's finished.
Not sure why you'd think Bunnings screws are not "suitable".
Most of the strain on the machine heads is borne sideways by the hole ferrules; the screws just basically hold them in position.
I can't see why the screw type would be particularly critical. The screw heads are well-finished and aren't easily chewed up by the screwdriver. Not exactly "dress" screws, but then neither are the ones supplied with the kit