I have a "JPL Ultra 2000 Compact Ultrasonic Cleaner" which I bought from Amazon in March last year. It cost £31.98 it is now available at £22 (Grrr...) athttp://www.amazon.co.uk/s/?ie=UTF8&keywords=jpl ultra 2000&tag=mh0a9-21&index=aps&hvadid=4031997699&ref=pd_sl_8pbq3l4dpm_pp
It takes my (normal size) AB and all its bits. I don't remove any "O" rings. On advice elsewhere I add a tiny drop of washing up liquid (I don't think the special liquid is necessary). I think this reduces the surface tension of the water and makes it flow more easily into crevices, but that is a guess.
I use it after every session but my modelling is a slow process so a session lasts for no more than 20 minutes about once a month and I don't want to leave it partly uncleaned for as long as a month. I first remove the needle, nozzle, aircap and colour cup, wipe the needle and the colour cup and put the other parts to soak in airbrush cleaner while I use the little AB bottle brush (soaked in cleaner) to clean the passage between the front and up to the seal which is between the front and the trigger. I then use an inter-dental brush to clean the nozzle and a pointed piece of paper towel to wipe the inside of the air cap. Then all those parts including the needle and the body (except for the handle) go into warm water in the U/S cleaner. It takes about 4 minutes before switching off automatically. Very satisfactory. I don't get blockages any more (except when I fail to notice that the paint is rather thick and needed more mixing or shaking).
I have tried it to clean the kitchen food mixer rotating part, false teeth and my electric razor but with no any visible effect.
You ask about stripping the AB. I do (as mentioned). When I started modelling 1 1/2 years ago I got a lot of frustrating blockages due to not cleaning thoroughly enough. My H & S Infinity CR Plus has seals (PTF) that are suitable for enamels and lacquers, so ultrasounding would not affect them. I don't think that the cheaper rubber seals would be affected either. On repeated cleaning, H & D told me that it was safe to ultrasound my AB as often as I liked, even twice in a row. They also advised that putting a rubber mat under the AB body would prevent the appearance of the body being scraped/rubbed against the metal base of the cleaner. In fact, I made a little plasticard cradle. Their ABs are beautifully made.