Theres a website you can order stuff on called Amazon.ca. You're thinning your paint with dawn dish soap? 
My apologies. Ok 1000 sets. With that kind of experience, I think you already know the answers to your questions. Now might be a good time to order some "backup tips " so you don't have to spray with a 417.I believe I said I've sprayed close to 1000 sets. Maybe you should read before speaking. I've said many times in this thread that the 417 was the only tip available to me at the time locally.
My tip of choice for cabinets is a 311 hea tip