It's a good idea to use straps of tape that have ends firmly on the shaft and that run all the way over the end. Because the parts were permanently fixed, a broken shaft meant a replacement had to made all the way from the ground up, so you had to count it as good as lost the second it was fired. Crane Beaks can be reused as long as the wooden cylinder is in good shape. If the shaft is broken, cut the tape, slide off the head, and tape it to another shaft. If the ends of the head are damaged, either funnel or padding, they can be replaced with relative ease.
Any recoverable part reduces the work necessary to make replacement heads.
I have made dozens of arrows with these heads, and tested them against both inanimate targets and men, including myself. They fly at least as well as regular Marklands and have about the same range. I recommend you make a lot of these and then go help me introduce them to the heathen barbarian Trimaris hordes.