Yeah righto, I am running 40 pump nozzles on my little A12 and it still delivers so much that I've backed the accelerator pump completely off so the duration of the injection is short and heavy. I need smaller nozzles and a longer duration with lighter delivery to pull the engine into the main circuit quicker (and power-band) and with less hesitation.

For carb cleaner I have used some basic degreasers, citrus works fairly well (surprisingly). Weber alloy is much more robust and can handle any degreaser and can even take paint stripper to clean it up. Solex/Mikuni's are a more delicate alloy and you have to be careful with what degreasers you use as some will scar and taint the surface.

As for dellorto's just give it a go with a quality degreaser and some hot water. I spray mine when they are dry, scrub them thoroughly and then leave then in some very hot water with degreaser in it. I repeat that over and over again to get a good result.