[EricH]

Originally Posted by Oblarg

That was one of the best and most reliable systems we've ever had on a robot. It never failed. It never even required maintenance. Worked like a charm for every competition we attended, and for demos for years after.

It was also incredibly easy to make and not demanding in terms of precision, at all. Several pieces of angle-stock with three holes drilled in them, some bolts, and some nylon washers.

That would be successes one, failures some much higher number. I've seen a couple that were very poor, and one or two that looked decent but didn't perform as you might expect.