Hi Jerry,
Did you scrape the edges of the inlet marked by the smoke so the plate is sitting at full depth in the inlet? One thing I finally learned is not to make my inlets too tight. I used to obsess about making them perfect and then I would always have to go back and scrape the edges after I put stain and finish on the wood. Moreover, the tight inlets risked chipping wood off when I removed the plate or installed it and I always risked rounding off the upper edge of the inlet in that process. Now I make sure my inlets go in place with very easy finger pressure and I don't worry about tiny gaps in the initial inlet. Those gaps always disappear completely when stain and finish are applied. Inletting too tightly and perfectly initially was simply a waste of time and effort. It took me quite a while to accept that.
dave