Minecraft 2 player trading system

Hello there guys and welcom to my latest
invention so i have been away for a long time since my last project
i sorry about that and i am very sorry about the very very long wait for the
next update of the desert survival.
So today we are going to be looking at my new
2 player trading system wich works on 1.7 and above.
How this works is that each player will have to get inside of the trading room and
throw their trade items into the water.
After that flip the lever next to the sign that says accept  trade.
Each player will have to flip their own levers for this to work.
And once you and your friend accepted each other's trade a chest minecart
will show up next to the sign that says finish trade.
After that flip down the levers and push the button next to the finish trade
sign. I hope you enjoy my design
and i will see you guys next time :)