Hey, Fletch, thanks! The fam is great. My oldest son is actually planning a trip to Spain later this year, where he will stay for a year, marry his fiance (she's Spanish), and enjoy the exposure to a different culture!
I use a pretty fine grade, though it's labeled course. I'd say the pieces are, on average, the size of a small pebble. I use this primarily because it's cheaper! Actually haven't tried hempys with a larger grade, but I've considered it. Lately I've been mixing in vermiculite at one-third of the total volume (for the water retention) - that spares me somewhat if I miss a watering, which is usually done every other day or so (once a day when they're deeper in flower). With my mini-hempys (32 ounce/1 liter) I make sure to water daily all through veg and flower.