Well I changed the oil on the SS today. Needed doing, too; the sludge filter didn't look like it'd ever been taken out!
Just as well I had a 21mm socket!
But those well-nuts underneath are a pig. The other 5 fixings on the RHS are fine, but I reckon I'll get the ones underneath changed to Dzus fasteners ASAP. And doesn't it take some oil: nearly a can-full, 3.9 litres. Still, the more oil the better I suppose.