The floating keeper is contained in a @50mm length of the strap, so when fastened there's actually 3 layers of strap in the length between the keepers and the friction stops the keeper moving. This is the same with both metal and canvas keepers, and also with Haveston nylon straps, of which I also have a few. So from the 12 o'clock springbar, under the watch head and around to the buckle there's a single layer of strap, then the buckle, then 3 layers to where the floating keeper is positioned, then 2 layers back to the 12 o'clock springbar. I always fold the very end and pinch it when putting these straps on, the resultant curve keeps the pointed end flat. I can't recall ever having the end become loose. With the usual Nato style, folded and tucked back under ( shudder! ;-) ), there are 4 layers of strap and a loop sticking out ( shudder again! ;-) ). Of course you can put the buckle just where you want it with this style of strap. The canvas wears in very quickly and becomes quite pliant to the extent it conforms tightly around the springbars and also doesn't feel that it makes the watch sit high, at least to my taste. I converted a standard nylon Nato to single pass, but of course the uncontained floating keeper is able to slide right off the strap when changing and it was never tight enough to contain the free end properly. There's a picture below to illustrate, I fasten it on the 8th hole rather than the 6th shown, so less overlap, and the perspective makes it look more bulky than when actually worn, when it all compresses.
