Now my only issue is Aguila Blanca's recommendation to not shoot it lest it should crack the slide.
Other than being aware it is a slight possibility, I wouldn't worry overmuch about it. Which is not saying its a fine idea to hammer out 1,000 rnds a month, every month, until something fails.
The last major govt purchase of 1911A1s was in 1945. Unfilled purchase orders were cancelled. The war was ending, and we had enough pistols. Those guns, the newest of which were made in 1945 served through Korea, and Vietnam, and remained in front line service until officially withdrawn in the mid 1980s.
If there had been a significant problem with the slides cracking, I imagine it would have been fairly big news, and we would have heard about it in the 50s, 60s,70s, and 80s. We didn't.
Sure, it has happened to a few guns. That's verified. Stuff does break, even the best stuff has a failure rate. Very small, but it does exist, just remember that there is a big difference between "it could happen" and "it will happen".
The "poor heat treating" of low serial# 1903 Springfields while famous in the gun community these days, and considered a good reason not to shoot those rifles today, wasn't enough of an issue to cause the Govt to pull the guns from service. Nor was slide cracking of 1911A1s.
While I have nothing to support it, I suspect that at least some of the slide cracking of WWII vintage 1911A1a was due to some modern owners trying to make "race guns" out of them. More than a few people did that, because at the time, the guns were relative cheap and common, and the general passion for GI issue condition military firearms was much less than it is today.
I don't think a moderate amount of shooting, once in a while will harm your gun. However, I cannot state categorically that it will not. Your gun, your choice.