Nice work there!
That blade angle at the bottom edge will do its best at mild scraping plus spreading/leveling and even with 48” an 8 or 10 it will manage fine. It will not be much use on unbroken soil/gouging which is just as well ‘cause for that you’d need some extra oomph anyway! (And remember, pressing down too much on the blade with your feet helps the blade but lessens the weight on the wheels and can cause wheel spin!)
Another good idea is to avoid heavy uneven loading while it is in use. Excessive pull on one end will try to torque the mid-hitch/frame.
The longer WH blades are mounted to the rear axle, similar to a front blade. They can be more aggressive since they tend to dig in when under load where the mid-mount blades tend to lift when under load.