OS .18 CV-RX is more than enough power.
I had to replace my stock drive shafts with some CVD's, I stripped an idler gear(it was pretty old though, havent had a problem since), I notice my hardend steel yokes are pretty worn after about a gallon, and today I stipped my CB(yes, I'm running a robinson racing spur, and the steel is much stronger than traxxas steel, so when my motor mount came loose, my engine just tore up the CB. Now I have metal shaving all over my chassis).... Not to mention the wheelies...

But I love the thing