There's a pot and pin on eBay listed in the last couple of days, as usual, no connection.
https://www.ebay.co.uk/itm/Austin-7-seve...SwEaBaHHRL
Regarding balance, I had a 1931 saloon which vibrated horribly above 40mph even if coasting in neutral, I filed out the holes slightly in the correct direction and set it up with a dial test indicator to get it running true. It made a massive difference and was well worth doing.
https://www.ebay.co.uk/itm/Austin-7-seve...SwEaBaHHRL
Regarding balance, I had a 1931 saloon which vibrated horribly above 40mph even if coasting in neutral, I filed out the holes slightly in the correct direction and set it up with a dial test indicator to get it running true. It made a massive difference and was well worth doing.