So yes, I got the .60 size Great Planes Dural Landing Gear today. The base of the gear will protrude about 3/16" from each side of the Dolphin, as did the Super Strength composite gear. It is a very small amount, and when installed near the wing you don't notice it, even if you are looking for it. I"m pretty picky about these kinds of things, and it didn't bother me at all, really.

The .40 size gear will not protrude out from the side of the plane, but you will lose 1.5" in wheel base (width).

The Dural landing gear will look great on the plane. It is light weight and much stronger than the stock gear. I'm gonna paint mine white too.