Seems my ploy of leaving pages open on the wonders of ultrasonic cleaners for jewellery etc has worked - Mrs B says it would be good to get one Anybody bought one fairly recently and have any recommendations? I realise there's a big step between a cleaner for a few trinkets and one you could drop a carb into. Thoughts very welcome.......
I have a Chinese cheapie of 2.8L that will accommodate a pair of carbs stripped of slides and float bowls. This kind of thing: https://www.amazon.co.uk/GT-Ultraso...ords=ultrasonic+cleaner&qid=1574165336&sr=8-6
Pay attention to the time cycle options i.e. will it only do 15 minutes, some will do permanent on others will only do a short duration. Also go for one with an integral heater.
Ron your findings sounds more like it was a Magnesium alloy rather than a high purity Aluminium casting. This can be hard to determine visually but read up on testing alloys with malt vinegar to reduce or minimize any hassle in the future