I had to modify and elftmann trigger to get it to work on the last round in a mag. The mag bolt catch was interfering with the strike on the last round.
I did some redneck modifications, but for the $$$ I paid for the trigger, I didn't need to be a gunsmith.
That said, I'm 'hoping' my modifications worked. I'm at the curmudgeon point in my life where I feel when I've paid top dollar for something, I don't need to use my own personal "mr. fix it" jedi powers to make something work as 'they'- (specifically the company elftmann) advertised.
I am glad your mod worked though~