why cant you just use it "sideways" it will give you an indication where the ferret is, and indeed, if it is still in the burrow.
I've packed ferreting in now, but if i were ever to get back into it, i wouldnt drop a ferret in a burrow without a locater collar on.
I dont see the point in paying for one and not being able t use it very well. After all they never used to use them