After I got it idling, I used my "socially distanced" neighbour to get some video footage of my "unnecessary" journey up and down the street to see what it rode like.............it rode nice but I noticed on the video that it was smoking a bit too much for my liking, still running a bit rich but something a bit more......oily............decided an oil stem valve seal change in-situ was a good shot so made a widget up to do that? The engine had checked out ok for compression and leak-down but it was worth a go anyway. In hindsight I should have learned my lesson from my last builds, and completely teared down the engine for a full once over, but as it was running fine all those years back I decided to gamble.....which has bitten me in the arse