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Check the web site cruzinperformance.com/
They will redo your originals for a very reasonable price and the site offers some suggestions you might be interested in.
Mine were balanced within 0.3%. Additionally, they have stainless steel internal parts and have a rise time of 1 msec compared to the slower pintle type. I am very happy with mine. The prices on-line are for a single injector, they will reduce the price for a set of eight.