I dropped the top pitch of Titan on Chocolate Fireguard's 'special' 8mm a few years ago, using a Stop and a normal steel braking krab, and it was bloody terrifying - I had to push the lever the 'other' way as there was no 'Stop' at all, and I ended up wrapping the rope around my leg as an extra braking device. Watching the Event Horizon ledge arriving rather quicker than usual is something I won't forget in a hurry. Going up was marginally less frightening, as it was very slow and steady, but the constant creaking from my Croll, and the massive bounce on the rope was not pleasant. I did Nettle on it shortly afterwards, and that was better as it's so tight, and I would happily do some pitches now on my Banana/Handy krab, as the free hand and extra friction control is what I was missing! But not sure if I can cope with massive free-hangs on it.