I'm using Bosch Micro Edge on my 2 Merkur Scorpios. They came with a bunch of "adapters" for different arm widths and appear to function well. However, I haven't had them on long enough to comment on longevity. But with NE icy winters, ice on the rubber usually tears them up before they wear out.

Would using a 1" shorter blade increase the cleaning efficiency of the swept area? The search continues.

Bob