Hi Ed,
Welcome to the Forum, I was donated a 520 a few weeks back identical to yours just blue and with a REBEL decal on the side,cleaned her up and fitted an exhasut and she runs beautifully. Not usually my thing as I mostly do pre 60s mowers.
I dont share you love of Cricket lols. But Love a beer, My brother brews as well using his own grains and mash and I make all his gear, keg mods,wort chillers any stainless work he has a fridge also hold 3 kegs,glass rack on top with a side shelf and hose and tap come thru the side. he actually enters comps and has won a few minor awards. Anyways I also share you love of tinkering with engines as ive been a Auto Tech for 20 years. I hope you enjoy all this forum and its memebers have to offer,they are a great bunch,Diverse and knowledgable in all areas of most types mowers and small engines.