I used one an entire week in Coz two years ago.Patrick:IMO, one of the best plates for single tank diving is the old plastic plate. It has a handle, is very light and compact for travel, and they are dirt cheap (not water front dirt).
Or you could use Pat's Medium weight pockets attached to the cam straps.Patrick:If you used one of the older plastic plates and wanted to add weight to it, you could add lead bullet weights on both sides of the cam straps. This method can also be used with existing steel plates.
Ron