Bought myself an ultrasonic cleaning tank off ebay. Its not new its 6 month old but was the one i wanted and £100 cheaper than a new one of the same make and type. Its 20 ltr heated with mech timer i all so bought some cleaner for £27 x 5ltr and is mixed with tap water at 10%. I have 9 banks of honda carbs to clean 4 to each bank. If you send them to be cleaned its around £20 a carb x post so a bank of 4 would be around £100 X VAT so its a good saving. So we fill up the tank with tap water around 15 ltr and add the cleaner and pop in the carbs. I have semi dismantled the carbs for this test. Timer was set for 20 mins but i gave them another 10 to be on the safe side. water temp was set to 60 deg the results you can see for yourself. these tanks will clean most things from a necklace to an alternator and come in a wide range of sizes.