i run with the originalīs FT for a year... realy a torment... it seems that with less check up, better they stay.... but sometimes they leak a lot...
3 weeks ago, a run with v2.. fantastic... no leak at all... with hard rebound, no rebond etc etc, no leak...
one note: i rebulid the new v2 with old oīrings, and its good!
i advise...