Im sure a little more would not be a problem especially when micro nutes are involved. You must be careful when it comes to the big three such as nitrogen, phosphorus, and potassium.
The big three are taken up in much larger quantities so the opposite is true, you have less room for error with micro`s because the amounts are so small to begin with. Chemists are meticulous, they don`t do "near enough, the boric/solubor difference is huge, might as well be measuring in teaspoons, tablespoons and small handfuls, not hundredths of a gram
"The same applies to the chelated iron, knowing the weight isnt much help without knowing the Fe percentage, and to a lesser extent, the type of chelate used."
This is where the nute calculator comes in handy, Every time i bought chelated iron it always list the %. In some states it is against the law if the label does not show the exact percentage. BTW.. DO NOT EVER use EDTA chelated Iron, it is actually toxic to plants. The best type of chelated iron to use is dtpa chelated iron.
Thats my point, theres no mention of the chelating agent or Fe%, a chemist would list them. This recipe is supposed to be plug and play for beginners so there shouldnt be any need to use a nute calculator.