www.thingiverse.com/thing:6973643I 3-D print these things and they are pretty good. I've done a bunch of boards and never had a problem. You do have to drill a hole in the board, but it takes a long screw and holds really well. It's not like one of the other inserts that you have to glass into the board. With a flange on top, you drill the hole and glue the flange onto the deck and the shaft into the board. I designed this to go with the standard self tapping screw that most people use, but I run a M6 tap ton them and use standard M6 screws which hold really well. I designed it so the screw takes the majority of the load, putting less pressure on the 3-D printed part. The thickness of the flange on the top is the same thickness as most traction pads so once you clear away the traction in that spot, the bump of the insert isn't much of an issue
I would honestly be really wary of having a professional do it. If you do make sure to get pics of the laminate and the board repair before that traction goes back over. I've had kiteboards with "professional box additions" And they just cut a hole in the laminate in the deck and didn't re-laminate over it, threw the pad over the mess and the board cracked immediately. Just make sure to ask for pictures documenting the process.
Another cool thing you can do which really doesn't help your resale value but it's pretty awesome for you. Is to get your foot straps exactly where you want them. Take a GoPro out and document where your feet are when riding and you can get straps that match your stance exactly. This is kind of optional for wing but is 100% essential for strapped prone, I was never able to get in the straps on a production prone board until I did my own straps and got them in exactly the right spot