Actually, I did the .36 before the gated converters came out. I was expecting they would send me a 'ported' converter (as I ordered it over the web) but they ended up sending me an 'unported' converter ring. Which ended up being OK, as I decided to ream the cylinder out to accept .357 magnum cartridges...and since I wanted the solid converter ring for that (FYI-reaming to magnum length not recommended by Kirst) ...it all worked out fine. (I would recommend that you call and specify exactly the type of converter ring you want, otherwise you may end up with whatever happens to be on the shelf.)
As for reworking the innards of the earlier guns, I imagine over time they've changed the specs that they make the guns to, and the converters are made to the 'newer' manufacturing specifications.
No, I did not get the ejector rod. The cartridges come out faster if you drop the cylinder anyways.
I only ported one of my conversions, (one of the 'old' 6-shot .45 ACP's) and I didn't use the ejector rod on that one either, as I shortened the barrel to 5". The other one is also a 6-shot .45 ACP, and I got this converter used with the gun...it's one of the early Kirst converters with no milled in spacing between the ring and the cylinder. That revolver was in bad shape, so I ended up replacing the innards, cutting the barrel to 4 3/8", new front sight, and nickel plating it. I also nickel plated all the Kirst cylinders (but not the rings).
Here's the .36 1858 Navy (Now it's a .38 Special/.357 Magnum 1858 --stainless with a nickel cylinder...shown with .357 mag and .38 Special cartridges)
Here's them all: 2 stainless, 1 nickel plated (top gun)
Yeah...um...in my opinion the firing pins shouldn't be denting the hammer like that. In fact, if anything they should be just putting just a little circular mark on the flat face of the hammer, not actually denting it, just marking it. They seem to be hitting awful low...I like the pins to hit in the center of the hammer if at all possible. Again...looking at your 1st picture....the face of the hammer should match exactly the angle of the firing pin housing where they meet as the pin is fully depressed, IMHO.
No sense damaging the guns by having the cylinder/hammer batter each other...as by time you buy the cylinder and revolver, these 'conversions' end up being more expensive then an actual cartridge pistol
(By the way, Numrich is great for innards and spare parts)
Hope that helps some.