Pressure Arm on Maxwell Windlass

[Alecadi]

After about no more then a dozen anchorages the pressure arm (white and yellow plastic things) went off
Replacement is not a big deal neither is the cost.
But I'm wondering is this should happen so often and why such a cheap plastic things is used instead of something more permanent and stronger?

Also I've been told that on an all chain you can do without it.

Any experiences to share?

[sailorboy1]

mine got chewed up on my SL windlass this year and I took it off while waiting to replace, it did jam up more on both the rope and chain without the pressure arm, but it did still work as long as I was "helping" the rode off the windlass