I originally ordered with Optics Planet but they kept delaying the ship date, and I used a one-time credit card # that was only good for two months. (they hadn't charged yet obviously) I got a ship notice on my 507k from
https://modernwarriors.com/ so we'll see when it gets here (USPS shipping....). Sorry to hear about your yard issues.
One issue I've heard about the 407k/507k is a severe "fishbowl" effect of the lens. The video I posted previously stated this and I've heard it mentioned elsewhere. Hopefully in practice it isn't that bad.