ive got it! went for a test run, without the seat (lol) as my wife was going to work. It was awesome! except the bump on the tire (due to inner air tube warping) made it bumpy on every revolution when it hit the bump
Here is a pic!
rear axle was 145mm but after i told him frame spacing was 140mm i should have known i needed 150mm! as frame spacing is only the inner to inner measurement not the outer!
more detailed pics coming soon, but hope you like the concept behind it