How to rubber band a DR4B

So im trying to rubber band my dr4b, but i dont
understand how to perfectly rubber band a lift using triangles

Put standard rubber band placement on each four-bar, then add a constant amount of stretch to it. You may do it backward at first (guilty…) but just play around with it. You also want bands on both sides of each C-channel so they do not bend.

Google Photos

What is the purpose of the zipties

And what do you mean by standard rubber band placement

Standard rubber band placement would be a straight rubber band one bar to the other at the correct angle to assist it. It’s very hard to explain without a diagram, but I can’t make one right now. The picture should suffice.

The zip ties keep the rubber bands from getting stuck on the top four-bar when it comes down.

Just on the topic of lifts, for a double reverse four bar
Is it more efficient to mount motors on the lift itself or on the base?

You should start a dedicated thread for this question as its pretty debatable and would probably veer off topic from this thread.
Check this out