Question on front landing leg on my M105a2

Got my M105a2 from Barstow, and was wondering what is the correct type setup for the wheel's / wheel ? Its a 6/1985 Turtle Mountain. From what I've seen of the GL site, they all look to be the 2 smaller metal wheel. Nor the single larger one?
Any thoughts on the matter?
(See attached pix)

Either one will work. The one big wheel is the older style.

The duals are more commonly used. Do you have a back leg too? Those are helpful for loading when you're not attached to the tractor. I've had one tip back in 1995 and it was ugly.

2 questions:

I thought they all had a back leg?

Which landing gear is preferable or are they comparable?

definately the two wheeled design... think loading per square inch. I've seen the singles sink into hot blacktop when we had them loaded with 155mm Willy Peter shells.

Who cares about loading? the 2 wheel is better just for the fact it has the 'crank jack' setup on it!!

Fo' Shizzle

I just won an M105A2 today out of barstow. It has the older single wheel. The last 105 trailer I had had the dual wheel stand but no leg in the rear, I regret ever selling it. Ill probably end up swapping out my old landing gear for the updated set up. Those trailers are too darn heavy to picking up, thats just asking for a hernia!