They are trigger plate action with no external screws to bugger.
This is incorrect. The Dickinson (shown in my pic above, in the center) is a true triggerplate action, but the Iside is a boxlock. It may not be apparent, as the pins are hidden. It is a boxlock action, but with some internal modifications, including the use of coil springs. There are no visible pins in the action, except the hinge pin for the barrels; all other pins are concealed behind the head of the stock. The hammer pin is located behind the fences.
