I took it out again yesterday
I have found that unless the leaves have previously been picked up, you get just as good finish by running over the pile of leaves or running it through the gardens - watch for rocks but anything else goes generally. Had a (previously inaccessible) bit with a tonne of built up leaves.
Didn't want to go in there until I figured the couple of rats I was hunting were dead.
Caught a couple of small rocks, and hit a big chunk of rope, but didn't tangle anything.
The biggest problem was when I hit the dead rat - no fun at all! A decent 2 wheelie bin bags of leaves reduced to 4x catchers.
Only thing I can really fault with it beside the bits of chaff occasionally blowing up the chute when the catcher is packed is the air filter. I might try a snorkel, but I think that will clog quickly as well - just the nature of the work. Need to make an oilbath