Don told me that the rest you bought was definetly a carbon model,I don't know this as a fact since I'm not really a WB fan to start with . I'm sorry if I've steered you wrong with this rest I would never do this intentionally,but I was just taking his word for what this rest was .
Nubo,
No problem buddy,
I just think that there is such a range of shaft diameters out there that its a little confusing. I will buy the generation 2 insert as from what I read its some what easier on fletching. The price was right, I'm still happy with my purchase!