Great!! I finally was able to show you something of use! I am intimidated by your knowledge, but am attracted by your vastly informational posts and sharing nature. Having been a former machinist ( I have a small machined shop at my house, vertical milling machine, compound rotary tables, indexing heads, 9" South Bend Back gear Lathe, Mig/Tig welders, etc), I really appreciate the effort you put into your projects, and the craftsmanship. Most people have no idea how things are made. Reading these threads has taught me a lot. I design and make recumbent bikes/trikes occasionally, this is one I made a couple of years ago. It has rear suspension and front disc brakes. I had to fabricate 90% of this thing, including the hubs for the wheels. It goes really fast though, even faster when somebody healthy is pedaling it! 18 m.p.h. is an easily sustainable cruise mode of this, on level ground.