Calf nerds: Every extra kg we put on one of our our seated calf raise machines takes 3.5kg to lift, & it's 32kg force just to get it off the ground.
What about your machines?
@Seth0Neill @evthierry

Here's the other 3 options that often get used - note how different the force required to shift the same weight is

Here's all 4 I tested on one figure-the reference line is where the weight on the stack is the same as the force needed to lift
Note 1: The 2 seated calf raise have quite different effective force required
Note 2: The Knee Extension machine rally doesn't offer much resistance IMO