Got the KRG knob in the mail today. I have to admit that I wasn't expecting much, but I was actually really surprised. The knob came packaged in a pretty nice box with full installation instructions, multiple fitment washers (o-rings), epoxy for permanent installation and a KRG sticker.
Installation was a snap and it fits really well on my Sendero SF II with the smaller set of o-rings. Clearance isn't an issue (I was a little worried about this) with either the stock or the scope. The knob seems well designed, well thought out and well made. Only time (at the range and in the field) will tell how the thing will hold up, but I'm not sure what's not to love at this point.
Always happy to be pleasantly surprised by a vendor,