Received the spinner kit from Whirl wind. The quality is top notch. Carbon fiber spinner, laser cut, primmed ready to paint. The fit is absolutely perfect... The prop extension is also top quality, fits like a glove. Black anodized. Now I have everything I need to fit the cowling.
Note: One of the concerns with Whirl wind props for the O-360's in the past was... 1/2" bolts for the spacer, and 7/16" bolts for the prop hub. That has changed. The kit now has 1/2" bolts for the spacer and hub for the O-360.