|: Joe, I think you are completely right. Irene's idea also looks very unstable to me. I had basically the same, but with wood beneath it to take the pressure. It still wasn't stable enough so I changed my setup in the way I described. But your's sure it way lighter. The spanish construction also seems to be reasonably light.
Which one is the spanish construction? I think Joes looks light but I never cut metal. I hope mine will be stable and not too heavy. I am using 3/4" plastic. But the center is totally hollow now. I hope they only add 1/4lb. to each skate.