There are some items that I would like to learn more about - that I am considering but have not seen yet. Therefore I am listing a few in hopes that someone in this forum might have some experience and be willing to give a yea or nay. Here goes: 1. The Leupold magnetic boresighter - I understand that it is not critical where you attach it to your muzzle? 2. Source for a really good shooting mat - don't want a combo dragbag/mat 3. The little thingy that attaches to a Harris bipod to deploy it quickly - are they worth having?