I wanted to know which model of cleaner would be suitable for cleaning the Weber carburettor on a 50 year old classic sports car that I'm restoring. So I called Ultrasonic Cleaners Ltd. The lady I spoke to said someone from the tech department would get back to me. Shortly I had a call from Ben Pilkington, the owner of the company. He gave me a lot of advice, explaining the differences between some of the models and recommended the DK Sonic 600D as being capable of doing the job and also fitting my budget. It arrived the next business day, well packed, with a complementary bottle of carb cleaner concentrate. The first time the carb went into the cleaner, I set the timer for 1 hour and the results were amazing. 50 years of dirt, varnish and old petrol deposits had gone. To be absolutely sure, I turned the carb around and gave it a second clean. It now looks almost like new (see the photos). I'm very impressed with the quality of the ultrasonic cleaner, the power of the carb cleaner liquid and the personal service given by Ultrasonic Cleaners Ltd.