In the new version I put the bomb on the hole then put all 3 movable block without stair on lifters, and with the bomb remove the not conveyor one in this way the left and top block can be pass for upper aisle near the entrance, then down and using the bottom left pushers move it to center. my problem is free the button on bottom center after I use it to lift a block that press the upper button. And I have no idea if the left bomb is useful...
Using the bottom center block to use it to lift a block means that you can only use that button once. This is because you would need to use two blocks or a block and a bomb to get it pressed. If you use the two blocks, then the area is permanently blocked to you. If you use a bomb, then the bomb destroys the button.