Center CVD/tranny rod ?

I am just finishing my BL/Gorilla/SM Maxx and was doing a little testing last night and somehow I ripped the output rod comming out of the tranny on the rear side that the drive cups on the CVD connect to on the bottom of the gorilla single speed tranny. I lost both the drive cup and one CVD. luckly after some looking I found the CVD and I see i can get another drive cup from SM. Is there a better output rod thing I should use then the traxxas one I dont see it on the monster website anywhere or listed a a hop up option or do most use the traxxas ones? anyone have any ideas on what I have setup wrong that made this happen? Thanks Jeff