I know Mark personally. He's a good dude, retired deputy, and knows a thing or two about shooting. He's been involved with Army marksmanship training, and has had associations with Shepherd Scopes (and maybe Burris, IIRC). As you can tell from the video, he can be as cheap as the day is long, and function definitely triumphs over form:
If you have time, his channel may have other useful bits of info for you.