How to prevent chain wrapping?

[dlang]

gravity assist replaces the bands with simple rope (paracord or similar) and
weights. People have used elaberate pully systems, I did an example with just a
couple pieces of pipe

Weights for chain tension

I was having problems with the elastic cord not keeping enough tension on the slack and the chains twisting as a result, I made a quick trip to home depot and got the cloathsline pullys and a couple conduit sweeps, here is the result (works much better, but I need to relocate the end of the chain to handle the full work area) I didn’t bother relocating the metal pulleys from the old arrangement. the screw in the center is to hold the sled out of the way. the paracord seems to have no trouble w…

David Lang