So, i have a Bushnell HDMR that has some play in the parallax knob. I am debating on sending it for warranty repair/replacement, but if they replace it, what will they replace it with. I love the scope and it is still functional, but the 1/8 turn slop in the knob is bothering me. has anyone sent in an HDMR for work that was replaced and if so, what did you receive back?