behndy wrote:... i just got contacted by LDP guy, and he's saying he watched that YT vidja, the amount of carrier signal noise it's making IS way too much and yes, that unit is broken. wants me to send it back to him so he can fix it.

That's what you were trying to tell him.
So, a customer needs to make a video in order to get their attempted return
of defective pedalage taken seriously?
Has he explained to you why at first he thought the pedal was working correctly and now it's broken?
Tastes sour to me. Money back, only solution.
Even if he gives you your money back, you're not obligated to change anything you've done. What's already done is already done.