11B10, I have detailed stripped P30 LEM's and it's not to complex after doing it twice. Trigger spring was the hardest part, but using a cut down coffee stir stick (thin red type) to hold on too, doable. Yes other brands have less parts inside and the exploded diagram on HK looks over engineered it's not really a big deal. Lots of tutorials on the Web to help you out. My P30/P30sk complement the VP9 nicely and have replaced everything else.