Mods for new Condor SS

I just bought a used Condor SS .25 and I’m wanting to get some insight on what mods could increase accuracy. The gun has a Talon Tunes top hat and a Maddog Ultima stock.

Does anyone know if it’s possible to install a regulator that fits with the Maddog Ultima? It would be a big plus if it had a way to be charged without removing the tank from the gun, like the Talon Tunes tank adapter.

Are there any other must-have mods for the gun that would work with the Maddog stock?