I stole my wife's chopping board and made a gauge console out of that a a few years ago and frankly, she was pissed (boat smelled like garlic for a long time, too). I swore I wouldn't steal anymore of her stuff after that episode but, after looking for one of those wooden or black center pieces to replace the missing one on my SeaStar hydraullic steering wheel and realizing they don't sell those without buying the entire wheel replacement, I decided the top to that weird smelling candle she keeps in the bathroom looked like it would fit right in the wheel. It took a little sanding and went right in like it was made for it! I put the set screw in and it worked like a champ. That $8.00 candle saved me a bunch of money and effort, although she's pissed again and I can't figure out why? The candle's still good...it just doesn't have a wooden top on it. Is she being overly sensitive? Point is, if you're missing one of those center inserts to your wheel and you can't find one and have gotten tired of looking at that nut in there, go to the store (don't steal the one in the house) and find a candle with a wooden top. They come in all different sizes and you'll find one that fits just about any wheel.