If your recipe works for you then that's awesome! Don't fix it if it isn't broken! You can avoid sugar crystal in others ways too, like brushing the sides of the pot with water, putting a lid on the pot so the condensation runs down the sides of the pot, and of course not stirring it while it cooks. I've never had an issue with crystals, also, syrup for IMBC isn't as fussy as other candy making type things. A few crystals won't kill your IMBC.