Anything I can add to show building Inspector? (photo attached)

[Brian Ellis]

Im looking to open up the floor plan, and would like to remove the center load bearing wall. I have talked to a few contractors and this is what we've come up with, the rafters are 2x6 and the roof is a 5 pitch. There is support in the basement. Columns every 8':

I would like to avoid having an Engineer come in, I know the building inspector will know if it will work or not. Any suggestions would be greatly appreciated. Please keep in mind I am not a contractor or engineer, so please don't laugh at my drawings!