The standing leg press.. are you talking about a hack squat? I also do a duo squat pushing 185 lbs one leg at a time.
Discussion
I’m not sure what this machine is called. Harder to explain. It does allow to push more weight than other machines comparatively.
Hmm take a picture of it.. I’m curious. Some machines and set ups I have no idea what they are called. On the hack squat I do 120 lbs so definitely less than what I do on the leg press and duo squat machine. However everyone is different.