Steering wheel...
First time around I measured and scaled up the 1/35th kit for wheel diameter. Wrapped tape on the 1.5 exhaust tube to get closer to the 2.16 dia. I was aiming toward. The copper wire is springy so wrapping around a 2" would end up being closer to 2.5"
I was not attempting the New Mexico flag..
Here are the supplies I used. 10 gauge AWG (2.5mm) left over from when I wired the garage and 3/4 (19mm) copper pipe, split and flattened. The wheel is version two because although it came out the right size, visually I thought it way too large. The rim surrounding the wheel is version one.
Outside dia. reduced to 1.86" (47.2mm). To me that looks more appropriate.
On to the side vents and coaming.
"Don't believe everything you see on the internet" - George S. Patton
Eric