Scapular elevated at all times. Look at hands at all times. Walk as close as possible to the wall. Do not allow your stomach to touch the wall. Feet only!
Knees touch the wall. Knees stay together. Hands shoulder width apart! Look at your hands at all times. Do not round your lower back. Do not close shoulders.
Isolate the movement into 1 leg at the time. Align the working leg with the already perfectly aligned hands, shoulders & hips. Elevate your scapula fully at all times. Do not round your back or slip into a posterior pelvic tilt when you bring the leg back to the wall.
Start with your shoulders over your hands and keep them there at all times. Look at your hands and keep your elbows locked. Jump with your feet on the box right behind you without moving your shoulders backwards. in a second jump align your hips with your already aligned hands and shoulders. Do not focus on holding the tuck. The goal here is only to align everything and come straight back down.