some of the cassette hubs are nothing more than fancy freewheels
and how is the Current Production of Malliard Helicomatic hubs and sprocket clusters, that meet that description
doing these days?.
That last cog # 8 requires the right end of the axle to be even longer than 6/7 speed which was lengthened from 5 speed
... simply insert a bearing in place of a spacer at the outside of the freewheel for more support ?
show a Picture of the Machine shop you have to make weird custom Parts..
as said... the introduction of the freehub made the freewheel old technology..
the gain made is precisely moving the drive side axle support bearing outboard, very close to the dropout.
is it possible to reduce the risk with say, a stainless steel .. axle?
You can Buy a Phil Wood freewheel Hub
https://www.philwood.com (now relegated to special order ?)
why the lust for that 8th sprocket?
./.