Hey mate, you'll need to pop over and post an introduction.
Unfortunately I'll only be able to post approximate sizes, I built it basically by eye and didn't write any of it down.. I can't measure it anymore because someone ran into the back of me a couple of months ago and the insurance mob replaced it with a kaymar bar.
If you do go down the road of building your own I'll be able to tell you how I worked out each measurement as you go.. I pretty much built it on the car so it looked right.