Originally Posted by N941WR
There was also an increase in Gross Weight.
Only in the Aerobatic Gross Weight. The so-called "Dash 1" wing came about later to make the RV-8 and RV-7 wings more common. This commonality results in a 50 pound increase in the Aerobatic Gross Weight (from 1550 to 1600 pounds), but offers no increase in the Max Gross Weight (1800 pounds).