Hi Ian and Jack,
The air filter will be a much better unit than the standard one. Mine is packed with a felt like material which probably doesn't breathe very well.

I have had a look under my mower and would say that the blade plate is a replacement, mine has four blades fitted instead of the two. I would say it was replaced so as to fit the extra blades. Good news is that I have found a brand new set of blades

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Last edited by CyberJack; 02/02/17 09:39 AM. Reason: Embed image