RE-ADD THE GEAR

Re-add the gear that was scrapped and replaced with redstone. maybe keep both! And add something new like the gear piston and make it so that if redstone is powering the "start" gear over the level of 10 it will go the opposite way but 0 power will just make it stop. AND PLEASE PUT THE MECHANIC OF BEING ABLE TO SET THE SPEED OF THE "START" GEAR OR THE "FINISH" GEAR WICH ARE TWO BLOCKS MOJANG SOULD ADD! !!!PLEASE PLEASE PLEASE!!!