Hi,
for OWB simply use normal grease, nothing special, nothing containing PTFE or other synthetic oils / mixtures. Because You simply want the OWB to have 'grip'.
The description of that 'TriFlow' stuff sound nice: 'provides twice the lubricating power of...' which means for a OWB: half the grip ;-).
No, I think triflow is OK. But in my opinion there are two useful things for a model helicopter: simple motor oil and the cheapest grease You can find. All other stuff is a waste of money. And in case of any doubts: margarine is the best grease You can get from Your fridge
.
Jörg