The benefits of this Huma-Air, Air Arms S200 tuning regulator are:
The regulator housing is made of extremely tough 42Cr steel
Tested for a working pressure of at least 3x the working pressure of the rifle, for everyone’s safety
A constant pellet speed over the full working pressure range Because the regbody comes between tube and valve you will get 45 mm. extra airvolume
The regulator body and the housing are one piece, so no chance of the regulator moving inside the cylinder
The one piece body and regulator housing also reduces the possibility of leaks
DIY fitting is a real option for the most people
High quality bluing in the same matte color as the original pressure tube
Higher accuracy of your rifle due to the elimination of the pelletspeed fluctuations
It will give you a better shotcount and a full flat shotstring immediately
Adding a regulator to your airrifle will probably give you the biggest benefit in the tuning process.