I got zipp alumina ski bends. Would have liked a bit more rise but with the tilt mechanism of the mono extension I was able to get it to where I like it. I like a 15-20 deg tilt. Not sure where it's at right now but I'm fine with it. The tilt is named out though

BTW I had to drill two holes on the bottom of the extension to route cables through the plugin. If you have di2 is probably not an issue and you could route the cables through the ends but with mechanical the bend would be too tight. So if you get carbon ext drilling them might not be a good idea.. I think :-)