Title says it all. Looking for RDS for my 43X MOS for EDC. Considered Swamp Fox Sentinel until I found it goes dark in the dark, which doesn’t make sense in a dark defensive situation? Ideally I would like it to set as low as possible and without using an adapter plate. Top or side battery replacement would be a plus. Always-on or Shake-n-Wake preferred. Reliability and long battery life would be nice and all this with a price that doesn’t exceed the price of the pistol.