Aha @RokSolid I finally got round to watching the rest of that excellent vid on the big black dong.
So my theory with M100 equal springs vs ASG’s or Ausgel 1.18mm springs that are longer is true.
Why I do not follow the M rating. You get more boost out of a longer spring and softer on the gearbox. Get everything right and a 20" AR with an V2 APS sings along at 320fps without killing it or hammer the fk out of the front of the GB. Not needed when you run gel ballz. Or big black things 
