This was one of those projects where the finished parts were pretty well all made exactly as per drawing. I messed around a bit with the 5/8" dia. s.s. rod in the drop hammer, but probably didn't have to. Ultimately, I drilled it out to 1/2" inside diameter to reduce its weight before realizing that the two magnets embedded in the slider had lost their magnetism due to an application of heat. Once I had replaced the magnets, I turned a peice of 1/2" dia mild steel and filled the hole back up again. This is not a project that I would recomend for driving with a small steam engine. It simply requires more power than a small steam engine is capable of producing. I had fun with the build, and ultimately it DID work as I had envisioned. It was a good practice project, and although I can't say I learned any new machining techniques with it, I certainly brushed up on some of the things I already knew, and it filled in a two week void of "What will I do Ma" time. I am now entering the summer doldrums as far as "Real Work" is concerned----Many factories are closing for "summer vacation shutdown", the economy isn't rebounding like we had all hoped????---expected??? Thank you to all who followed the build, and commented.----Brian