Andre'--
Good set-up!
My engine is sitting on 6x6 framework. The only change I'd make if I did it over is to put a sheetmetal guard over all the wood as an oil barrier. I've got a Mini-Petter set up on wood with a metal cap and it's just perfect.
What program did you use for the drawings? I've been looking for something like that.
I tried AutoCAD, but, could never get the time to learn it well. I then got AutoSketch which has turned out to be more to my needs. It uses same file and drawing types as AutoCAD and can read and write AutoCAD files and symbols. It's meant as an Engineers sketchpad that will work with AutoCAD.
Amazon .com has it for $109.xx You can draw your own symbols or use AutoCAD ones, you can save stuff as various file types (including AutoCAD). You can do precicion drawings and zoom in to get details right because it uses vector type drawing not bitmap. They also have AutoDesk Inventor at $50.xx, but, that appears to be limited to a set type of task, plumbing or electronic or IC or etc. Each package costs $50.00.