The funny thing is I've already collected all the size data via caliper and the list is already composed so most of the work is already done. In fact, I already have every one of them in my B&H "Wish List" so all I have to do is click the "Add To Cart" button. Several years ago I bought/sold quite a bit and it was my personal experience that good caps, especially the correctly branded ones made a difference in selling price. In that light, many of the replies here surprise me. Maybe APUG is just a more forgiving and open-minded group.