Ok, I see, so you are proposing that I modify the end of the blower housing so that when connected to a straight duct of the same dimensions it will exit the wall at some point. Nice.

I often wonder where to take the hit on a bend or juncture. The other option was to let it go straight for a bit and then take the 45degree hit before sending it out the wall. It certainly is simpler to make a plywood plenum that angles from the blower itself and goes straight and I like the idea of modifying the blower housing just a tad to get a straight run. It is less of a hit. Truly tenacity and guile at work. Much obliged for your thinking outside the confines of the blower as given and creating a blower as required. I like it.