Hey, 

     I was just wondering if anyone tried to make there own shut off system or clamp for the end of the reducer hose?  I know you can buy some hydraulic or air controlled ones that have proven to work well but I was just looking to make a simple one I can slip around the end of the hose and clamp it off. I have an idea in my head but I wanted to see if anyone beat me to it already?

No one? Either everyone bought the complete package, drips concrete everywhere, or is  worried I will steal their idea, patten it and make millions! 

One way is to bend the tip hose over and slip a fan belt over it to hold. Another idea i heard of is to cut a slit in the tip hose a inch or so up and slide a mason trowel in it . 

Yeah the idea club is pretty slim these days..

This is what some of the guys use. Just an old clamp and a tip pf 4" line welded together.

I just cut a slit about 6 in from the bottom of the whip and use a homemade slide with a handle to stick in there.  I found a mason trowel can be to sharp and you can cut your finger.  When I don't need the shut off, I just duct tape to hole shut. This way I am not changing hoses all the time.  I don't prefer to use that one pictured because it is too much weight hanging there.  I do not like that extra metal hanging there.  Too many times, the man at the end of the hose isn't paying full attention to what he is doing and if I make a wrong move.  OUCH!'