I share the author's enthusiasm about GCM devices. I am also finding that I need to change the over-patch long before the 15-day window because it gets messed u

I share the author's enthusiasm about GCM devices. I am also finding that I need to change the over-patch long before the 15-day window because it gets messed up. I've found these [1] quite useful. [1] https://www.amazon.com/dp/B0C4PKMJTN https://www.amazon.com/dp/B0C4PKMJTN