Thanks to you too, ZommyGun, for a lot of good info. And stuff I'd never have thought of.
The reason I got the 10/22 is because I was told it could be modified up the ying-yang and that is what my grandsons are all about--putting junk onto something that is already good enough. So they will probably get a real thrill when they see all the stuff you're mentioning and all the stuff they can add to the gun. Probably won't even look like a gun I'd want to shoot when they get done with it. But they'll learn lots and that's what it's all about.
The reason I got the 10/22 is because I was told it could be modified up the ying-yang and that is what my grandsons are all about--putting junk onto something that is already good enough. So they will probably get a real thrill when they see all the stuff you're mentioning and all the stuff they can add to the gun. Probably won't even look like a gun I'd want to shoot when they get done with it. But they'll learn lots and that's what it's all about.