John,
I didn't send it back, because they'd kept it five or six weeks, just to fix the Posi-Lok and install the knobs. I'm glad now that I didn't send it back, as I think that I'll like the Stoney Point knobs better. I already have 1/8" knobs, so the only thing that I'd gain for the $60, plus loss of use, would be the configuration of the knobs. With the S.P. knobs, I can change back to low knobs with cover whenever I like. (And, I'm only paying $43, shipped, for the S.P. knobs.)
Hopefully, they'll actually credit my VISA account, as they promised me they would two weeks ago. (Hasn't shown up yet.)
On a positive note, the Burris people were extremely nice, and the scope is of outstanding quality.