If your dash mounts the empeg on a forward sloping angle, then your drives won't just be upside down - they'll be at an angle. The drive tray right now isn't horizontal.

Next is the fact that you'll have the board getting all the rising heat from the drives with no way to ventilate.

The handle will also fold upwards. :)

And lastly, who is this supposed to be a benefit for? I'm assuming left-hand drive people (everyone outside of UK and some British Colonies) - seeing as there is potential for screen blockage on the left side. Something a reworked fascia can remedy. I actually made the blockage worse on my modified fascia, but this was only a temporary solution and something of test anyway.

Bruno