F5 arrived yesterday....this am took it out for about an hour....very happy with the machine...nothing brilliant today, found one of each or our current coins (i.e. 5c to $2)..had everything except a $1 coin, and was thinking just that, when the audio gave a very definite and attention-grabbing sound, and I duly completed the set. The numerical ID on Aussie coins is the same as the F4, but different to the Omega and the Gold Bug Pro. Am looking forward to trying it in all metal on the beach in a month or so. My first choice of locations was not available today (being mowed), so I was pretty happy with the way it performed at choice No.2. Having the constantly updating ground phase is an interesting feature, and one which is very useful, even in parks and such. Had to be careful with the disc knob (it kept riding up the scale), but it wasnt a worry and something like that helps to keep the mind on the job. HH Pete.