Essentially a kitbash of realSavageMan's Air Hokkaido DHC-6 with the floats of Chancey21's Viking Air Twin Otter, both of which are already very nice aircraft.

Now, the Twin Otter is fully capable of amphibious operations.

I've removed the Air Hokkaido-specific markings (mainly the lettering) since to my knowledge they don't operate float-equipped DHC-6s. All else except the pontoons and their supports are unmodified. The pontoons themselves have been scaled up somewhat from Chancey21's aircraft (and adjusted to fit, of course), but are otherwise pretty much unchanged.

Controls

AG1: Engine No.1
AG2: Engine No.2
AG3: Reverse thrust
AG4: Landing lights
AG5: Doors
AG8: Parking brake

Note that due to the (realistically) increased weight and drag of the floats and their supporting structure, the aircraft's performance has been reduced somewhat. Though it is still fully capable of STOL operations and extended slow-speed flight, acceleration and climbing are rather less impressive when compared to the wheeled version, as would be expected. Despite this, I've ensured that the aircraft still behaves properly even with the increased weight and drag, and it can still do pretty much anything the standard version can do, just a little slower.