We don't use our cooktop frequently (maybe 2-3 times total in the 2+ years we've owned it), preferring to cook outside or just use the Instant-Pot when we're stuck inside. We had previously found a prefinished board that's supposed to sit on top of a rolling toolbox which fit nicely over the cooktop when a few adhesive rubber feet were added around the outside edge. The cooktop is induction, so no fears of starting fires either. So, it's been like that for maybe a year now.
I had some time this weekend and decided to figure out how to make it more permanent, then the thought came to me: cut a pocket into it so the cooktop will sit inside the board, both making it look a little more designed-in as well as lower profile.
I have CNC router I built a few years back, and while not the fastest method of cutting it out, it's definitely a flagrant abuse of a machine capable of so much more.
Some satin lacquer was applied to the exposed wood to help reduce moisture absorption and warping a little. It matched the original finish surprising well. Lastly, I changed out the original larger rubber feet we had been using for some much smaller ones 6mm x 2mm (around 1/4" x 3/32"), so it'll still grab the counter, as well as protect the cooktop should anything push down hard enough to make contact (unlikely).
And here's the finished product, which somewhat resembles a built-in cutting board:
Another use for the tiny rubber feet are on our wireless multiplex control panels, so we can find the main light in the dark.