Tru-Turn aluminum spinners are very accurately made and balanced. They solved the balance problem on John Callentine's Seafury when other spinners caused vibrations.
Tru-Turn can cut the prop slot to suit your intended prop. I was VERY pleased when they told me they have the geometry of the Cox-Resinger 3 blade CF props.
Jim,
Tru-Turn absolutely makes a great spinner, I've used them for years.
Spinners as large as 4" on Moki 1.8!
Tru-Turn offers anodized colors. I purchased a red and a black one and the plating quality is perfect. I sold the red one to a SH modeler.
The black one is on my ARGO II.
Still, it's probably a matter of personal choice?
I guess they are under "new" management............. I say that because a few years ago I called them about cutting slots into a "Froom" spinner for me and they wouldn't do it!
Jerry
The reason Tru-Turn doesn't work on other brand spinners is because of liability. They will only work on their own products.
Tru-Turn, also has a 'return policy' for 'unused spinners.' That is, if you have an unused Tru-Turn spinner, even if it's old, you can send it back for credit.
They do have to examine the spinner.
I sent one back unused but a tad 'marked up,' and they declined. I knew they would have, but I tried anyway.

I like the bolt in the front but I never use spinners smaller than 2.25".
http://www.cfcgraphics.com/tru-turn.html