I can review and test the plastic v alloy LFR.
I've been running the alloy lfr for months now on my jay harness and it is lush! no corrosion and smooth operation.
My only gripe is that the radius does not match the chicken loop so relies on line tension to stay in place. On occasions when I crash the lfr has popped off. Its no biggy as it can be popped back on easily. However a lfr with a tight ridius so the chicken loop can lock into it better would be a worthwhile design improvement,