Have a 55" panel, VESA 300x300, to mount to a stone fireplace above a mantle. Fireplace is glassed-in, gas-burning. TV basically has to go there. Am aware of view angle potential issues. Electric outlet and HDMI cable run to location. A wooden insert is present in the stone and is 14" wide, just over 9" high. Having a hard time finding an appropriate mount I could attach to that wooden insert which I presume is there for this purpose, and to spare myself having to go exploring and putting holes in the fireplace. Thoughts on doing this / a mount suitable which also adjusts/tilts/swivels? Appreciate any help.