Thanks guys.
@Alex. There is no insulation between the board and the case mate but I understand what your saying, I think the picture gives a false impression though.
The board itself is actually about 1" from the rear of the case and is also supported properly on brackets, as well as being held in place via the main power input jack etc. Also on back side of that particular board there are insulated wires which are folded back on themselves, so if the board were to somehow move or bend that rather large distance only the insulated wires would touch the case.
Regards
orb