I never tried making bread dough with my Mom's Sunbeam, but the few times I did use it for cakes, I found it very lightweight.
That is probably because I am accustomed to my KitchenAid, which I've had for 20 years. When I was a kid, Mom had a really
heavy old-time Sunbeam, that lasted almost forever. It was much more similar to my KA in weight and heft than the one Mom got about 15 years ago.
I don't know if that helps with anything...
I also would like to know what a "pizza screen" is!