well if we are talking pickling ..............

First I would use silver solder so the joint line looks like brass then into the sulphuric acid pickle.

While quenching is not essential consider which is safer a hot piece of wire or a cold one. Since air cooling and quenching have the same results why not quench since then the wire is cold,

while the wire is still straight after heat treating cleaning with abrasive is easy to do.

I was trying to make life easy with as little complication as possible.

The quench is not necessary. But it speeds up the job. if you quench in a solution of citric acid (obtainable from home brew or heath food shops) & leave in for an hour the brass or copper will come out clean. You don't know till you have a go.

Excellent, thank you.

if you want to use brass wire wound to make a shoulder , first heat the wire to a dull red ( gas cooker burner is fine )
then quench in cold water.

it will then be soft as the proverbial. Polish it up with some fine abrasive ( I like wet and dry used dry).

Now all you need is a former ( a little smaller than finished size required) wind around a couple of times and snip the loops off.

You can then position the wire where required and "sweat" them together with soft solder ( back to the gas cooker).

Brass and copper are both softened the same way red hot then quench.

Nonsense, in your new workshop all things are possible! Get fettling.

Good idea, thanks, but beyond my skill set I think.

You could use fine brass wire soldered round the brass tube to create the shoulder, and trim up with a fine file.

Thanks for that. I suppose I could use an appropriately sized brass washer for the shoulder?

not sure if these are any use

http://www.cornwallmodelboats.co.uk/acatalog/yacht-sheet-leads.html

if brass is a must get 2 or 3 diameters of brass tube that "nests" one inside the other, the thinnest you cut to the length required then the larger just cut small collars fix together and use a file to shape the collar as required.

Easy to make in a lathe. But not to difficult with out. Get brass rod of the required size, hold in a vice centre punch as near to the middle as you can (a masonry nail will do), drill a hole down about 3/4", Cut off about 2". Clamp a file in the vice, with the rod in the drill round off the edge of the rod on the file. Cut to length and repeat until you have enough or need to cut another 2" piece. There will be no shoulder to rest on the deck so a neat hole will be required. Just take care.