I am nearly 99.9% positive that I am going to buy an FS reg, however I'm not sure on the shims I should buy with it. From reading a lot of forum chat I'm looking at the sweet spot for a DAM being 500 to 550psi, but it looks like I can only get one with an output pressure of 550-575psi. With that said if I can get one with less what would be the best option 500-525 or 525-550? I don't want to go too low as I don't want it to cause problems, especially as I'm also planning on adding the O ring mod to the breach that someone mentioned on the DAM FB page the other day. If any has any reasoning why I shouldn't please let me know as I am open to all suggestion's on how I can run my DAM more efficiently.