has anybody done the Tera flex low range kit.on their tj..with my 488 gears this seem like it would really be great for rock crawling.dont have to redo drive shafts and that's good just got done wrestling them double cardan joints front and rear with all new spicer joints ..sounds like just drop transfer, split the case replace front half..just not to sure about the quality of tera products,they seem kinda on the cheap side for quality upgrades..i like the idea of high range doesn't change but its a lot of loot ..what say all you jeep folks.