MAMMUT Bionic Alpine Belay

I've had this belay device from Mammut for the last two years and it has started to develop a sharp end in the middle wall where the carabiner hits the device,.
The device's three paralell walls end at the same height so the carabiner (mine is a BD rocklock) hits in the middle wall, opposed to an BD ATC that would hit in the two outside walls.

Shit -design?
Im using the wrong biner?

I'm pretty sure the same thing happens on my reverso, it mushrooms out a bit in that spot.  I don't think it's a big deal. If it bothers you, you can break the edge with a light file or some emery cloth.

It´s not "shit design" it is a decision the designer has to make. Used in guide mode if the centre web is equal height then when one climber hangs on the device the belayer can still take in or pay out the other rope. If the web is hollowed then one climber falling locks both ropes.
File any burrs off.

Larry S wrote: I'm pretty sure the same thing happens on my reverso, it mushrooms out a bit in that spot.  I don't think it's a big deal. If it bothers you, you can break the edge with a light file or some emery cloth.

I work as a guide and this happens to all of my reverso devices. I agree it's "not a big deal"

Not a giant deal but eventually that will turn your rope into a fuzzy cattepilar. I worked at a gym where we used versos and the same thing was happening. We switched to atcs and it was never a problem

Jim Titt wrote: It´s not "shit design" it is a decision the designer has to make. Used in guide mode if the centre web is equal height then when one climber hangs on the device the belayer can still take in or pay out the other rope. If the web is hollowed then one climber falling locks both ropes.
File any burrs off.

Nice, Thanks for the info Jim!