My Fletcher model 5700 arrived about a week ago. It's quite a machine.
I've been using Miter-Mite/Amp/Putnam/Alfamacchine v-nailers since 1990; first a VN2+1, and most recently a VN-42. They're good machines, but they can't match the features of the Fletcher.
The 5700 is designed similar to the VN-42, and both are made in Italy. But there are a few features the VN-42 doesn't have:
1. Two independently-adjusted vertical hold-downs, one of which may be turned off if not needed for joining a particular moulding. The single hold-down on the VN-42 has limited adjustment, and has always been inadequate for oddly-shaped mouldings, which are difficult to hold properly. I have all kinds of home-made spacers & jigs to adapt the hold-down on the VN-42.
2. No more changing the operating head to fit the v-nails, which is done with an Allen wrench on the VN-42. The 5700 has convenient steel filler-sticks for various length v-nails, slipped into place as the nails are loaded. Very quick & convenient.
3. The v-nail magazine opens pneumatically & has easy access. No more pulling VN-42's the spring-on-a-string (my string broke last year).
4. Two pneumatic pressure adjustments. In addition to the one for the hammer, similar to the VN-42, the 5700 also has a separate air pressure adjustment for the hold-downs. That's handy for mouldings with delicate gesso or compo.
5. Adjustable speed of descent for the vertical hold-downs. This minimizes the possibility of damage to delicate mouldings, and allows verifying the hold-down positions just before contact is made, as the vertical hold-down moves slowly into place. Or fast, as you see fit to adjust it.
I've only had this machine for a week, and I'm still learning about it. But so far, it's everything I expected, and more.