I bought a demo from Marco last year, discovered an issue a week or so later, Marco went above and beyond to help resolve it. It involved parts from Stern that weren’t available at the time so it took some waiting but I did get my parts and was completely satisfied.
Keep a few things in mind. The person(s) you have been dealing with is probably part of the show team and could be out of town a lot so patience (at least on my part) and some phone calls was key. And, also in my case, the part wasn’t available from Stern for months. Perhaps that’s the case with your playfield?
I, too, would love to see the inserts in question. I had not heard of lifting inserts, only ghosting.