I also have been ferreting a long time 43 years, also started with no locator, now would not go out with out one, in fact the last time out, my battery went, i do usualy carry spares, but had left my spares bag at home, and ferreting was not the same, I did bolt a few, but could have had more with the locator.
Ferreting has moved on for the better with this tecnology, and also the same with feeding, you hardly hear of anyone feeding bread and milk, and ferret complete for the Summer Months has been a good thing.
I often wonder what locators will be like in fifty years time.