You are ahead of me. As for the scoops, well thats what happens when you think you have all the parts removed from the kit and I let the my 2 year old daughter aka Shop Buddy play with the rest. Yeah, I can't find them now.
Ill be working with the base today. Ill see what is needed, you are right though when I mocked the base, the 1 3/4" seems to be to much, specially since I planned to add wood to car of body and the screws to hold it all together. Unless I decided to just make it a tad wider there and just use screws from the outside to attach the body to the base.