Meh, our minds get the better of all of us sometimes. Glad you got it figured out, now would be a time to suggest a back burner project of mine.

As I'm to understand, all a shop does with an injector cleaning is cycle the injectors rapidly in solution until they flow what they should. With that idea in mind, if one had a given volume of solution and an accurate timer, as well as something that would cycle the injectors where they could set opening/closing rates *cough*MegaSquirt*cough* then one wouldn't need to take the injectors to a shop to clean them. Sure you're not getting a nice printout of what your injectors are flowing, but you can visually inspect to see if the spray pattern is what you want and know how long it takes to empty a one liter of toluelene. That's the extent of relevance I have on the subject.