Just out of interest
My original bevel box on my 2012 (April) did not have the side air vent.
There was a vent on the top of the box with a plastic tube that was routed up near the headrests and then down to the bottom of the wood frame.
So it essentially dripped slippery stuff near the back wheel!
We cut pipe short and fed into an old plastic bottle as a catcher. Surprising how much was collected!
From memory somewhere twixt 50 and 60 mis over a few months.
Next bevel box had the side air vent
