Hi Jason,
I've heard of oneupmanship.... But from a piece of string to that!!!!

Good stuff with the steel. Judjing from the size of your lathe and the steel you have there I'd say you want a carbide tip like mine? That one looks like it could be fun to mount too!!
Mine are the larger one of these, the smaller ones were used in the mini ball turner.

For size reference....

Hope that helps? (I just used a normal countersunk screw to hold mine down....trimmed the sides a little. M3 I think for the big one and M2/2.5 for the mini one... Was a while ago now... )
That insert you have there looks like one of the specials sharpened and polished for aluminium only?? Will be good to see what it does when you use it, I was eyeing those up a while ago...
The cars.... There will be ample opportunity to see hundreds of them on the 26th of September at a place called Stanford hall (apparently) just outside of rugby.... The roads will be heaving with RS's from MkI escort RS2000's upto todays new Focus RS's and I'll be one of them too

Should be fun
Capri's .... It's hardly surprising when you see things like this....
Ok, slightly

But funny IMHO
Hope you're having fun making the turner
Ralph.