I designed and 3d printed this travel hang board and it works so well. it uses paracord to hang on tree's, pullup bars or just anything you can. Its token many iterations but now it works well. It feels good but i feel like its missing something that could make it better. On it it has three levels a 40mm, 30mm and a 20mm, if theres any other sizes you would use let me know. it should be strong enough but other matirials would work well like petg, and cf filaments or just anything stronger then pla. it uses costem fuzzy skin settings to add grip and costem easy to get off supports.Please try it out if you have a 3d printer. I would love some feedback on my design if you want to. Heres the link good luck.