I don't have a dog in the fight. I don't know the OP, his riding style, etc. So I will give him the benefit of the doubt. This is a real known issue but I have many friends that have as many trouble free miles (22 k) as I do and one with far more with zero issues. Everything I have seen points to tuning, riding habits and stage kits for 85% of them. It is very clear and known for years that HD will void the warranty for aftermarket tuners and exhaust headers.
I think HD has screwed over some customers and some customers have pushed the limits knowing they are in a dark gray area.
Always to sides two every story. Glad the OP has the ability to do a 128 setup with the right parts. That should be a sweet setup as my stock 114 is awesome!
Good luck