rocks may not need a doubler but you could keep the doubler for slow crawling creeks and stuff like that. i run a 203/205 with 4.88 gears and 43s and love it. i run the doubler on slow trials to keep from being in my converter all the time and keep trannt temps down and on the fun stuff i just...
i am building the exact same axle, what was the turn around on RCV treating your gears and did they also polish them as well? Im glad to see the axle is holding up for you...