I've been feeding frozen-thawed for over 10 years. I used to dangle by the tail for my cornsnakes, but I've been left with chunks of tail in the hemostats from the ball python taking the prey so forcefully, so now I also dangle, head down, from the hind leg.

All of my current snakes started off on live mice, and I've switched them all over to F/T. It took some longer than others, but they all eventually did it. My Kenyan Sand Boa pair took the longest.