I knew I recalled some info on Vans website back in the day, and thanks to the payback machine, I found it. This is from the 1999 version of Vansaircraft.com. It stuck in my mind because I started my RV-6 in 1999 and had this site committed to memory. A partial quote and a link to the website:
The RV-6A was modified to include extensive electronics, and other minor aerodynamic changes to suit Nigerian flying conditions.