[MrForbes]

There's a lousy video in the LA regional thread, here's a picture of it with the lifter up, sorry I did not get any with it down, I'll try tomorrow to do that.

The pvc arms just pivot in some short lengths of 1x1x1/16" square tube that's riveted to the top of the lifter. They each have a bolt that fits thru a slot cut in the pvc, limiting travel. Easy to make, seems to work well.