Simple fact... it works. I got 600cc's and that was my goal. RC Engineering says the spray pattern is Excellent.. and since the injector has been flowed... It's pretty obvious that there are no shavings in it. Not like it would be hard to clean it out yourself with some carb cleaner or something.
I'm glad you got your injector to flow the right amount, but do you think all four will? If all four do
, do you think it's worth paying to get all them flow tested when the origional mod required no flow testing? If you haven't tried tuning 740cc injectors, why do you think they would be so much harder then tuning your 600's? I don't see the logic in making a cost free carefree mod into a test of how well someone can hold a drill and if the injector will flow the right amount.......