PFD knife placement
When originally talking with mentors about what products they prefer, I heard Lotus Designs mentioned a lot as being a superiorly designed PFD. I did more research and came across one I thought I'd like but it turns out they are (at least when I was trying to buy one) hard to find used/less expensive than the list $150 so I took a pleasant educational jaunt up to see the wonderful folks at the Chicagoland Canoe Base. They had a used touring PFD (among many other things) for about $50, and decided to go for it.
 
orriginal locationThe next step was to decide where to locate the knife. There are two equipment clip attachments that came with it, one on the right abdomen, the other used to be located on the left shoulder. The abdomen location doesn't make sense for anything that could potentially snag on an arm, sleeve, paddle, etc. The shoulder location was good as far as being clear of snagging things, however, with my being left handed meant that if I left the current shoulder clip where it was, I'd be either gripping it awkwardly or drawing the blade across my neck - no good.
new locationSo I snipped the threads attaching the clip holder to the vest. Then I had a friend hold it up while I held the knife where I wanted it, so that the angle would be correct, and then she marked it with a colored pencil. Finally I got a curved needle and some heavy thread and sewed it on in the new location.

I'm thinking I might end up moving it once I have christened the boat and am actually going through the motions that would potentially cause conflict. But for now I am happy with the placement and methodology. When talking with another friend he brought up the point that the Lumbar area might be a good location, or under arm.