multi-handle pullup bar

I'm working on a multi-handle pullup bar. It will feature multiple direction and thicknesses. I hope to have pictures soon. You might ask, "What is a fat, weak guy that is horrible at pullup working on this for"? Well, it's precisely because I'm bad at pullups that I designed the bar and the monkey bar simulator. I hope by adding variety , that I will get much better at the garden variety pullup. I got board with them quickly, and I'm hoping by adding variety, it will instill interest and desire.