“ Makes life so much more easy “ … That’s so true …
Not being a critical area, the weight of the unit resting on the floor , we can make a sufficient channel on each side to adequately supply the vent 100% ( or so) and by peeling back the existing canvas , we can then cut away the vent access area and then stretch and reglue the existing canvas over the new surface… ( theoretically … )
We can then make a New cover for the AC hole ( we still have more Foam ).. But since we’re still working on it we’ll be sure to do that when we do the rest , like covering the drip edges ( and Ant-holes ) with a canvas tape/gasket and painting the darn roof … The List grows