G'day Geoff, I have just read through your build log, she is looking good, with all the talk about coppering it all brought back some memories, the little wheel is called a ponce wheel, you can buy them in different sizes and with different amounts of spikes on the wheels, this is what I used on the Investigator, on the HMS Surprise I bought the copper plates already made from I think it was Cornwall model boats, I think they were caldercraft, it took 2,200 plates to cover her, I'm looking forward to the rest of your build,
best regards John.