I would try the Velcro first. Mine are duct-taped on at the moment, but I plan to try Velcro next time (assuming there will be one eventually). Velcro gives you more options for adjustment if the leaders stretch or distort over time. That's what happened to the canvas leaders that came with my used frame, so I ended up making new ones. Went with duct tape because that's what had been used before but, if it had been Velcro, I definitely would have tried that first.