Mastertangler
That will work do you have any problems crossing the border with that set up?  I was somewhat concerned about crossing the border with a slingshot when they ask if you have any weapons.

Here is a picture of my kit and where I bought the 2 blocks.  The blocks have bearings and roll easy. All of the rope is parachute cord. I have lifted 180lbs using the block and tackle but it was hanging from a beam in my garage. 
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