Leave it alone! Unless it isn't performing correctly.
If I have to fix another kids gun who took it apart to lube the poppet when there wasn't a problem with the poppet...
The only thing you need to do is periodically cleans out the ram sleeve and relube the ram.
If the rest of it is working, don't mess with it!
If your consistency goes to pot, clean and lube the regs.
If you get a leak down the barrel, THEN AND ONLY THEN look at the poppet and valve seal.
Keep the battery life decent, over 8Volts in my opinion, although you can run it on far less.
And use a decent ASA and airsystem.
With the Halo B adjust the bolt so it sticks a couple of mm into the breech. If necessary pack behind the ball detents to make them stick in as far as possible. You don't want the ball in the breech to be able to roll much forwards or backwards.