These things are no joke. I've been working up the ladders from RTK and am currently on two 28 kg. bells for ladders of 2,4,6. I ran some video the other day. Overall I'm pretty happy with my technique. While I could get my elbow tighter, understand I am not going for a GS elbows on hips rack position. I did GS style jerks for about a year and a half before learning the hard-style jerk, and there is a difference.