Here's one with Marble's Universal. I don't have a picture of the HiViz installed that I can put my hands on.
Start by getting Skinner (described above) installed. Shoot at 40 with LEFT barrel and factory FULl choke with the sight post run all the way in. If that puts where you want it, install HiViz Comp and adjust accordingly both sight and choke. Then go to twenty and shoot RIGHT barrel with factory cyl choke. Adjust choke accordingly. You shouldn't have to adjust sight.(I know of 2 guns that have had adjustment issues out of now 20. One needs to be filed a little. The other, my son won't let me touch cause it works for him.
If the above results in a pattern shooting high, you'll have to raise the front sight to lower the POI (Marbles or Skinner). If it shoots low raise rear sight.
The point of using factory chokes is to save money. Once you're close order Trulock or others in constriction of your choice. All mine shoot left barrel Trulock Tky. The right barrel anywhere from cylinder to skeet 2 (light modified). I just depends on what that gun wants to eat.
