FX BOSS trigger adjustment, best FX trigger yet

Ernest and Michael,
Good morning guys,
I'm not overly happy with the trigger on my 500. Seems like after I get the first and second stage set to my liking and it's predictable with a light first stage and a no travel, crisp second stage it changes after a while where it seems the consistency of the first stage diminishes some and the gun fires really before I'm ready. Not touching the travel distance or the second stage yesterday evening I back out on the trigger spring a little more hoping to gain more differential between the first stage and the second. It seems to have help again but I haven't actually shot it to test it. Was wondering if a that doesn't work and I'm still not happy about trying the Boss's trigger assembly. Michael, did you buy it through AOA? Price? PM me if you'd prefer.
Jimmy 
 
JKing - It is possible that your trigger adjustments are changing after 'a while' owing to the very small grub screws being freed-up (by your initial changes), might be good to use a very light ThreadLocker (or even a dab of good old varnish - opticians still use this on Specs or Glasses!),

I have no engineering training (whatsoever :) ) but I think these tiny worm action screws are liable to move easily under pressure.