In reply to David Coley:
It has arrived. Looking at it, I'm impressed. It contains a knife and the hooked threader, so kind of 3 in 1 rather than yet another thing to carry. I can imagine this will be a lot quicker, but more importantly de-stressing when its dark, cold and snowing and you need to drill five v-threads in a row.
However, will not know it works until the next month.