FORMULA ADJUSTMENT:
I've altered my recipe a bit after deciding the dishes were not getting clean enough. Noticing sodium carbonate was the first ingredient in seventh generation's dishwasher detergent, I doubled the amount in mine.
2 cups Washing soda (sodium carbonate) per 1 cup Borax.
I'm still using 1/2 cup citric and 1/2 cup salt but the next test will be increasing the citric acid b/c there's still some slight residue coming out on the glassware - I'm not convinced about the vinegar handling the rinse so I would like to try and give it a boost with the acid to lower pH.
Stay tuned... or try your own mix and let me know what works (and doesn't) for you!