I have an Anics 3000 skiff with the old brass valve block.

I can take the top slide off with ease, knock the slide switches down, comes off no problem.

Now my friend also has one & im trying to see if it’s also got the brass valve block.

But for some reason his doesn’t want to come off seems really stuck on there?

It fires & functions well it’s just the top slide that won’t come off?

Any ideas to why his is not coming off & mine comes off very easily?