My relief ports are about 1/2" ahead of the rear mosst position of the piston. I plan to weld them up, then re drill them at the absolute rear position. All I need is that last 1/2" or so.
Yes, in CA you are limited to linking 10 or less to be legal and that is the way I do it with the 1919 too. With the price of 308, it is not bad anyway. That is why I was determined to do the build with desentigrating links.
Technically if you had a full belt from before the high cap ban and never let it get below 10, you could keep "topping it off". There is no requirement for you to prove it is pre ban either, but the safe way, and the way I do it is just keep them below 10. On the range it is not really annoying, and if the zombies attack, all bets are off anyway!