I can't imagine not having my two access hatches and yes we installed them upside down just in case one came open. Since we don't use the big table, just as a permanent bed, it gives us excellent access to those two storage areas under the seats.
As for cutting holes in the your unit, I guess I am more concerned with convenience if I want something added since there were already 5 big holes and several small ones when our boler
was built (doors windows
, vents, etc).
We put in a fantastic fan which meant enlarging the hole where the original vent was. We also added a small window just beside the stove that I found in a junk yard. It was originally a horizontal window but we turned it vertical so we have cross ventilation at the front and daylight where we sit.
I also added another electrical
cover outlet on the door side so I could pull out my extention cord which lives in the afore mentioned storage space. If you seal properly (no sloppy shortcuts) you won't have a problem.
We used to be in the old car hobby and decided when we got our boler
, that one vehicle being maintained "in mint condition" was enough. The boler
is our spring and fall
"home", so we want convenience.
Just sayin, do what suits your purpose.
V & P