i have the pedros trixie, no problems as yet. i had previously tightened using rotafix and hammer and screwdriver, when i got the trixie i used it to try and tighten lockring more and it wouldn't go anymore, so i guess it has tightened enough from skidding.
edit: the lockring part fits nicely around the cog and the hook is nice and sharp. the 15mm spanner is really useful as well, can fit the tool in a pocket. i was concerned the bottle opener would gouge your hand when applying pressure but it doesn't.
i have the pedros trixie, no problems as yet. i had previously tightened using rotafix and hammer and screwdriver, when i got the trixie i used it to try and tighten lockring more and it wouldn't go anymore, so i guess it has tightened enough from skidding.
edit: the lockring part fits nicely around the cog and the hook is nice and sharp. the 15mm spanner is really useful as well, can fit the tool in a pocket. i was concerned the bottle opener would gouge your hand when applying pressure but it doesn't.