I had my touring bike's threading extended further down the long steerer tube..
and between the adjustable race and the top nut (about 2")
I have: a washer , the brake housing stop for the front brake, another washer,
2 thin threaded locknuts, tightened against each other ,
a tube sleeve with the base of a bell brazed to it. [rest of the bell did not get
powder-coated] and the top nut [Tange , with a stem O ring ]