I built this pullup rig:
as part of my calisthenics workout. The problem is that it there's too much swing. The first version also suffered from instability issues, even with more pipes:
A Lowe's employee suggested I add diagonal pipes that attach to vertical pipes at an angle, using angle brackets typically used for fencing (suggested to me), but I'm not sure how that looks like. I've also seen this solution using clamps with diagonal supports (video).
What are my options in reducing the swing?
I'd like to optimize for ease of installation and cost, as I don't have experience drilling.