As a dedicated cross-draw carrier I have tried a number of different designs, by a
number of different makers and found the Mernickle PS10 DA to be my favorite.
I have them for J & K Frames as well as semi-auto's.
2" Model 36 shown at left, 3" Model 632-1 on the right.
When I first decided that cross-draw was the way I wanted to go I tried some of the
"dual position / 3 slot" holsters thinking I could kill two birds with one stone.
What I found is that, while using the 3rd slot, the weight of the gun was above the
support of my belt and that the gun wanted to cant out, especially when leaning
forward, so I was constantly messing with my gun, pushing it back into position.
The photo's below will hopefully better illustrate where the
bulk of the gun's weight rides while using a 3rd slot design.
Both guns have 3" barrels.
While I've never tried it, the possibility exists that you could get away
with using the 3rd slot with a lightweight gun that has a short barrel.