s10blazed
+1y
Just some ideas I'm throwing out:
You could make the longer bars adjustable to a point. My lower link bars have the end threaded into the tubing to allow some adjusting. It's not much but you can fine tune it this way.
Also, the center pivoting bar can have multiple holes (depending on setup) to allow you to connect the longer bars at different locations. This would alter the lift available I think.
As I said, I have never built a watts link but had those ideas laying around.