Weights on squats start at 225, 275, 315, 365/385. Leg press is normally around 8 plates on each side and I'll add a plate to each side with each set. When I do leg press, I cross my arms on my chest and bring the weight down to my elbows and back up. It allows me to have the same range of motion on each rep rather than guessing. On the hammer strength leg curls I start with 3 25# plates and add one each set on the first 3 and on the last I'll keep the same weight and do a drop set to failure on each strip down. The barbell hack squats will start with 185, 225, 245, 275. I could probably go heavier, but I'm wearing down at this point so I just stay somewhere that I can get at least 6 good reps in. On good mornings, I go with feel. I have went as heavy as 315 in the past, but I try to stay around 225 at the most now so I'll go something like 135, 155, 185, 225. But it varies depending on how I feel after everything else. But it's normally right around here. Leg extensions go from 180, 210, 230, 250 and after my set of 250, I'll immediately drop it down to 150 and burn out then go to 60 and do single leg extensions to failure. By the end of the workout I'm completely exhausted and can barely walk down the steps of the gym, but isn't that a good indication of a great leg workout lol?