Yes, yes and yes.

The 24's do have the tendency to crack but not on the back of the tangs like the 99's do, usually it's a crack on the side from the ones I've seen.

There were lots of changes made, so many I couldn't list them all. There are a lot of different models all with different options.

For example, the 24DL had a Monte Carlo stock, nickel receiver with engraving.

The 24C was a "camp" gun with a short barrel, ammo storage in the butt and a carrying pack that it fit in.

Numrichs carries a lot of small parts.