I try not to interfere with your web board but once in a while I may know something that can help. On the C62, remove half the wires on the concave grate, the front one. It is still "low wire" whereas the back is "high wire". Better yet, have the dealer replace the front grate with the new high wire grate. It will reduce walker loss far more than straw walkers. If you still have some walker loss raise the front of the concave grate half way between MID and MIN.