[davids2toys]

That is what I was told a few years ago. It never really made sense to me because ft the bottom is not sealed, that mean it is ventilating the inside of the box, Maybe just not enough perhaps? The tech I spoke with yesterday said he never heard of that!!! He also said I need to only drill 1 5/32 hole in the cap when a could of years ago and just last week the techs said (4) 1/4" holes!!! I think they are making this up as they go along.
I told him I have the socket style cap with the window in it so why should I need to drill and holes at all, I could just leave the window open for ventilation and he agreed!!