We have two LED recessed puck lights in our slide and the switch was on the ceiling and hard to reach when sitting down. The lights have flickered since the TT was purchased new - sometimes not much, and sometimes more. Very annoying and I expected that the lights were defective and needed replacing. Definitely not the converter as no other lights did this and last year we replaced the WFCO with a quality PD unit (the WFCO had failed). I just added a 3-way (aka on/on) switch at each end of the sofa.
When I removed the switch wires from the hole in the ceiling, one wire came out of the female crimp spade terminal. Then the same thing happened to the 2nd terminal. What I found was that whoever did the crimping at the factory used the crimper on the end of the plastic insulation where there is no part of the metal sleeve underneath. Not only that, when the worker stripped the insulation off the end of the wire, he/she removed about 1/2 of the individual strands and thus making for an even worse connection to the terminal.
So, if you have flickering lights somewhere, before blaming faulty lights or converter, you might consider the possibility of a bad wiring job by the factory. I have found so many 12 and 120 volt problems, it's ridiculous and now on our 4th season of our KZ TT I am still finding significant issues. This is inexcusable and speaks to the lack of quality control and training at the factory.
Oh, and the lights no longer flicker, yay!!