with the spring captive, it is to difficult to either remove OR replace the slide stop. Certainly not easier than just replacing it with a GI style plug.
That's why I use the captive system installed by my gunsmith years ago, it allows for the ease of removal and installation since nothing is under spring pressure when you pull the slide stop.
Apologies for the fuzzy pic, I don't do macro well. It's hard to see but there's a hole right in front of the frame shroud through the FLGR.
What you see here is what I have on all my 1911's. It's a single piece FLGR with a hole drilled through just in front of the shroud of the frame, and the hole is chamfered so it won't catch on anything.
The small pins are pieces of drill stock.
You lock the slide back and insert one of these small pins through the hole. You slowly lower the slide until the plunger hits the drill stock, locking the spring in place. At this point you can push the slide on forward til you can remove the slide stop with no spring pressure at all applied.
You then remove the FLGR with the spring in place from the slide, take out the barrel for cleaning or whatever with no worries about losing springs etc.
Assembly is simply the reverse but since there is nothing under pressure when you are putting it together the slide stop goes in easily and you can easily move the link around to get everything to line up if you want.
If you do want to take it apart the old way you can still do that of course.
I've been doing it this way for 20+ years. It's the only reason I use FLGRs. Especially in IPSC or something similar where you want to open the thing up often for a quick clean and lube, this way is great. And I've never shot a spring across the room doing it this way either