I use the oneway in the SD. Dont own one for the TC3, but if you need durabilty proof:
-many at my club run the tc3 with oneways a few of wich are very hack drivers(no gear damage to report)
-also keep in mind that the NTC3 use identical drive line components add a slipper to the ring gear. I know many run oneways in that car as well.
So i think its safe to say that any 5 bearing floating shaft car will have protected gears.