Hi. Regarding the twin cylinder, I recently put the older style 8" solid rubber wheels as the first iteration had them and the first time I saw a photo of a 500 was in an old victa leaflet, and it had these wheels. Made an impression on me and I wanted to emulate that look somewhat. I also got a repro nose decal on ebay recently.
The catcher is a so called Victa replacement, I lucked upon in a mower shop rubbish skip.
This is a couple of 2012 pics I took of it showing how it was when I received it. The dress cowl is actually black in colour.
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Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!