Modifications to an S410E/ERB???

[KDX200]

Short of regging it is there any mods that will make the S4*0 Xtra or ERB more efficient/flatter curve???

[engin]

Are you running on high power?

If so, turn the power down a bit and then chrono it to find the power curve. Fill to where the curve flattens

I have a large cylinder on an s400 running at 12 ft lb. I get over 120 pellets within a 9 ft sec range.