Review:
Order arrived a bit delayed (world wide supply chain issues, obviously), one mounting bracket was bent but I could correct that myself.
Mounted on our 54" mower with tire chains and without the mower deck, it works as well as can be expected from such a small setup. When stuck or overloaded, the blade's spring mount nicely gives way. On its highest setting, the amount of scraped-off gravel
is acceptable, tried to raise it a little further than the design intends but that threw off the spring's operation, tilting the blade way too early.
Easy post-season de-install, unit seems to have come through with minimal wear & tear.